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On 2012-03-05T18:40:19+00:00 Krt2076 wrote:

User Agent: Mozilla/5.0 (Windows NT 6.1; rv:10.0.2) Gecko/20100101 
Firefox/10.0.2
Build ID: 20120215223356

Steps to reproduce:

When using Thundbird (10.0.2) with Lightning enabled, writing an email
is annoying in that there are frequent, long (5 seconds) pauses before
typed characters appear.  With Lightning is disabled the problem
disappears.


Actual results:

It appears that Lightning is consuming a lot of processing power or it
has delays in it.  Perhaps it is searching a database too thoroughly and
too frequently.


Expected results:

Since Lightning is a background application to Thunderbird, it should
not be such a consumer of resources.

I have this problem in two computers, a Dell running 32-bit Windows 7
and an HP running 64-bit Windows 7.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/0

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On 2012-04-14T15:47:24+00:00 Vseerror wrote:

(In reply to krt2076 from comment #0)
> When using Thundbird (10.0.2) with Lightning enabled, writing an email is
> annoying in that there are frequent, long (5 seconds) pauses before typed
> characters appear.  With Lightning is disabled the problem disappears.

krt,
fIf lightning is the only thing you disabled ... does your issue match one of 
these other bugs?
https://bugzilla.mozilla.org/buglist.cgi?type1-0-0=substring;keywords=perf;keywords_type=allwords;list_id=2845058;field0-0-0=short_desc;type0-0-1=substring;field0-0-1=keywords;type1-0-1=allwordssubstr;resolution=---;classification=Client%20Software;classification=Components;query_format=advanced;type0-0-0=anywordssubstr;field1-0-0=short_desc;product=Calendar;field1-0-1=short_desc

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/1

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On 2012-04-14T18:48:37+00:00 Krt2076 wrote:

I looked through the other bug reports and did not find any that
appeared to match my report.

What I am describing happens on two machines, an HP 64-bit running
Windows 7 Ultimate and a Dell 32-bit running Windows 7 Enterprise.
Disabling Lightning has the same impact, viz., there are no pauses when
typing in Thunderbird.  Even when Lightning is engaged the pausing does
not always appear, but does happen more than half the time at some point
in the preparation of an email, having just happened while typing this.

FWIW, starting Thunderbird with Lightning enabled takes considerably
longer then when Lightning is disabled.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/2

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On 2012-07-20T16:01:53+00:00 K-ralf wrote:

Hi,

I can confirm that TB slow down if Lightning is actic. TB stopps working for 
about 3 seconds frequently (appr. every 30 seconds)
A change to the calendar tab needs takes about 5-7 sec. to show calendar 
entries.

I'm using Win XP SP3 German, TB 14.0, Lightning 1.6, with a small
Netbook. Before version 1.3?, the installation worked without -unnormal-
delays.

On another PC, WIN 7 (64 bit), the slowdown is noticeable also. But not
so annoying...

Ralf

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/3

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On 2012-10-22T13:09:07+00:00 Patricd wrote:

Same problem here. Unbearably slow under Windows.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/4

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On 2012-10-24T11:15:44+00:00 K-ralf wrote:

Still a problem with this "minute's of silents" here (TB 16.0.1,
Lightning 1.8 under Win XP sp3, home, german, 32bit and WIN 7 prof,
german 64bit).

During the break, within the status bar (below at the window, a kind of
progress bar is shown. But it is not showing a progress... Then the
window (calendar view) will be refreched.

Additionally it seems that Lightning is handling all defined calendars
even if they are not selected.

I guess it is time to change the bug-report to status confirmed!?

Who can do that?

Gruss

Ralf

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/5

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On 2012-10-30T16:26:36+00:00 pbrandao wrote:

Same problem here:
* delays in writing emails
* thunderbird stop responding for long periods (just now killed it with Task 
Manager)

More info:
* windows 7, 64 bits
* thunderbird beta channel 17 (32 bit)
* ligthning 1.9b2
* Provider for google calendar 0.18pre

On point that I think is relevant is that I'm only using calendars from
google calendar. The delay may be related to access to google.

In Linux however (with the same calendars but the stable version of
thunderbird 16 and lightning 1.8) this does not seem to happen.

Best,
Pedro

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/6

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On 2012-10-31T16:45:24+00:00 Worcester12345 wrote:

Within the past 2 1/2 weeks, Thunderbird has slowed down    I N C R E D
I B L Y   for us. Some/many are using Google calendar.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/7

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On 2012-11-02T18:51:08+00:00 Vseerror wrote:

(update to comment 4) 
have a lookc at 
https://bugzilla.mozilla.org/buglist.cgi?type1-0-0=substring;keywords=perf;keywords_type=allwords;list_id=4853331;field0-0-0=short_desc;type0-0-1=substring;field0-0-1=keywords;type1-0-1=allwordssubstr;resolution=---;resolution=FIXED;resolution=INVALID;classification=Client%20Software;classification=Components;chfieldto=Now;query_format=advanced;chfieldfrom=2011-01-01;type0-0-0=anywordssubstr;field1-0-0=short_desc;product=Calendar;field1-0-1=short_desc

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/8

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On 2012-11-06T22:14:45+00:00 Steve Switzer wrote:

I recently moved a customer over to Google Apps for Business with
Thunderbird. After adding Lightning, they started complaining about the
speed. We disabled Lightning (literally, the disable button) and the
speed issues were resolved. Of course, they need their calendar. So, we
enabled the 30 day premier trial, and added the Google Apps sync for
Outlook to their computers, and all is well. This stinks. I want to
advocate for open source, but this makes Thunderbird an unbearable
replacement for Outlook. I know Thunderbird on its own isn't meant to
compete directly, but I wish there was a really good replacement for
Outlook on Windows.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/9

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On 2012-11-29T23:18:47+00:00 List-c wrote:

Same problem as pbrandao:

As of a couple months ago, Thunderbird+Lightning has become very slow to
start and stalls often.    Not sure which version it started, but I'm
now on latest TB 17.0,  Lightning 1.9 and Provider for Google Calendar
0.18

At startup, Thunderbird hangs for minutes before operating normally.
Thereafter, Thunderbird will periodically hang again for awhile.

I'm on Win7-64bit.  The problem is specifically the google calendar
support.

If I delete my google calendar subscription, it resolves it.
As soon as I add the google calendar subscription again, it's back to massive 
stalls.

If I disable Lighting entirely, it's obviously resolved.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/10

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On 2012-12-04T03:26:28+00:00 Chris Hecker wrote:

I'm having this same issue, it's gotten way slower in the past few
weeks/months.  It was really bad a couple years ago, I started looking
into it, and it improved, so I quit, and now it's back.  Typing an email
is now excruciating.

Lighting 1.9, Google Provider 0.18, 5 calendars

I may try to hack it to only talk to the network on manual refresh, not
sure if that'll be possible, or if it'll help.

Chris

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/11

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On 2012-12-06T00:59:30+00:00 Blackmamba1962 wrote:

Yep, me too. Thunderbird became very slow recently.
I have 3 POP mail account & 2 IMAP
Thunderbird 17, Lightning 1.9 Google Provider 0.18, just one calendar.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/12

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On 2012-12-06T10:00:21+00:00 Edb-s-gene02moz wrote:

Wonder if this is connected to Bug 818448 ?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/13

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On 2012-12-27T15:08:05+00:00 Frédéric Meynadier wrote:

(In reply to Gene Scharmann from comment #13)
> Wonder if this is connected to Bug 818448 ?

I experience the same slowliness  but don't witness any increase in
explorer.exe memory usage (Win 7 64 bits, TB 17, lightning 1.9, but no
Google Provider)

Enabling or disabling the lightning extension is enough to switch from a
TB startup time of a few seconds to a few minutes, which is completely
unbearable.

On the other hand my linux box, which runs a similar setup, does not
have any problem. Perhaps is it a windows-only bug ?

I'll try to get a log of what's going on but I fail to see what module
should be logged...

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/14

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On 2013-02-25T20:29:40+00:00 Unique-ek wrote:

This bug is still here on Thunderbird 19 and Lightning 2.1b1

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/15

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On 2013-03-26T15:10:16+00:00 Wolfgang-7 wrote:

I have repeatedly noticed this problem on various linux installations
and instead used sunbird which did not have any problems. Since the
update to opensuse 12.3, sunbird is not functional for me anymore and I
therefore have to use lightning. The reduction of responsiveness is very
noticable on my machine, and I would enormously appreciate if a solution
could be found.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/16

------------------------------------------------------------------------
On 2013-03-27T14:12:10+00:00 M-marco-b wrote:

Same problem in Windows. 
To get the calendar working I searched a very old version of Thunderbird 9.0.1 
+ Lightning 1.1.1 : it works perfectly, but this is not a solution! 

Status of this bug is still "unconfirmed" after 1 year from the first
report... so nobody will take care of this, I guess..

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/17

------------------------------------------------------------------------
On 2013-03-27T14:50:08+00:00 Worcester12345 wrote:

(In reply to marco from comment #17)
> Same problem in Windows. 
> To get the calendar working I searched a very old version of Thunderbird
> 9.0.1 + Lightning 1.1.1 : it works perfectly, but this is not a solution! 

Not a solution, but a hint. Somewhere between then and now (or first
report of the bug), it broke. If you can work with some people on in
between versions, it might be further narrowed down and identified.
This is why it is nice having a large base of "testers" looking at these
programs. Without "testers", developers would have no feedback on the
product.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/18

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On 2013-05-13T09:18:33+00:00 Stetor wrote:

I can only confirm this bug.
TB 17.0.5 + lightning 1.9.1 + Provider Google Calendar 0.18

Writing a new messages it's a pain !
Also changing the preview pane from a messages to another it's really slow.
I dont' remember when exactly this started but i think in the last six months 
or the last year so this is compatible with the first messages of this thread.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/19

------------------------------------------------------------------------
On 2013-08-18T12:37:40+00:00 Kmaynard wrote:

Still like it in Windows TB 17.0.8 with Calendar on Communigate Pro
and/or Google. Problem goes away if you disable Lightning add-on. OS X
suffered same problem too, so I disbanded Lightning in favour of iCAL
and TB mail recovered its performance.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/20

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On 2013-09-05T12:23:17+00:00 Patricd wrote:

Does it help if we offer money, and if so, how much?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/21

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On 2013-09-16T00:38:25+00:00 Guyette wrote:

This has appeared again recently.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/22

------------------------------------------------------------------------
On 2013-10-03T15:44:40+00:00 Hany-g wrote:

Similar here with thunderbird-17.0.9-1.fc19.x86_64 on Fedora Linux .
Mail typing slowing from time to time plus when looking at calendar, it
sometimes is "blinking": items disappearing and then reappearing in
around half a second.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/23

------------------------------------------------------------------------
On 2013-10-22T15:07:37+00:00 Ymc-s wrote:

I'm experiencing this as well as described above (TB 24.0.1 w/ lightning 2.6).
Latest TB/Lightning version have not changed anything. The delay / duration of 
the lag seems to be proportional to the number of calenders (or calendar events 
downloaded?).
TB takes 1 full core of the CPUs during this.

Any way we/I can help with a trace or logfile ?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/24

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On 2013-10-23T18:14:18+00:00 Travist-g wrote:

Same problem after the Thunderbird update to 24.0.1 - typing slows down,
stops , starts at random- tired running with no addons - worked OK-
restarted- worked Ok for a few minutes then boom - back down to superbly
slow and making my life miserable.  I switch back and forth between
Word7 and Thunderbird cutting and pasting- then seems to lose US
keyboard and some characters get changed to other language, Thunderbird
freezes up and have to hard reset and CTL, ALT Del does nothing -
Checked everything else out.  Disabled Virus protection, firewall, etc
etc watching progress with Process Explorer to see if anything else is
interfering - Not using anything in my Calendar to keep it simple- but
still causing massive headaches!  Also using Noia exTreme 3.47 and when
moving to Word 7 from Thunderbird - see cursors changes and blink -

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/25

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On 2013-10-25T21:40:35+00:00 Giopippo wrote:

With the new update to TB 25.0 and Lightning 2.7, TB completely freezes upon 
starting if lighting is enabled.
Old Lightning versions do not work at all with TB 25.0.
In any case, since TB17 I have not found anymore a working Lighting version 
that does not slows down TB in an unacceptable fashion. Not usable anymore :-((
I had some hope in TB 25.0 and Lightning 2.7, but ithas been already 
frustrated:-(

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/26

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On 2013-11-03T14:12:43+00:00 Peshko R. wrote:

Same hers...Bug was open March 2012-more than 18 months ago and noone
from Mozilla even looked at that??? That seems strange or lack of
interest by Mozilla to what its users has to say...

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/27

------------------------------------------------------------------------
On 2013-11-13T08:14:38+00:00 M-marco-b wrote:

That's not a solution, but here helped to remove lightning and Thunderbird, 
then installing TB 9.0.1 with lightning 1.1.1
Obviously, you have to disable "check for updates" in Tool/option menù.

"once upon a time there was an app... working"

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/28

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On 2013-11-17T05:02:30+00:00 Matthew-mecca wrote:

If the Offline Support option for network calendars is disabled,
enabling it should improve performance. Right-click on each calendar in
the calendars list on the left side of the window, click Properties, and
make sure the Offline Support option is checked.

If the calendar is not shared with other users you can also set the
Refresh interval to manual, that will prevent the calendars from re-
loading periodically in the background.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/29

------------------------------------------------------------------------
On 2013-11-17T12:51:42+00:00 Peshko R. wrote:

Matthew, that didn't help. I have 5 calendars on th list, but enabled
only one. On that calendar I have Cache enabled and Refresh interval to
manual. Still the startup time is about 60-70 sec.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/30

------------------------------------------------------------------------
On 2013-11-17T12:53:10+00:00 Peshko R. wrote:

Even if I disable all calendars, the startup is slow. If I disable the
Lightning plug-in. Startup is normal.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/31

------------------------------------------------------------------------
On 2013-11-17T13:55:37+00:00 Matthew-mecca wrote:

(In reply to peshko.us from comment #31)
> Even if I disable all calendars, the startup is slow. If I disable the
> Lightning plug-in. Startup is normal.

When you say the calendars are disabled, are they just unchecked in the
calendars list, or are they fully switched off from the calendar
properties dialog? The checkbox in the calendar list will only prevent
the calendar from being displayed in the view, but it will still load at
startup, display reminders, and refresh. To completely disable the
calendar you need to right-click the calendar in the list, click
Properties, and uncheck the "Switch this calendar on" checkbox. A
completely disabled calendar will show as greyed out in the calendar
list.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/32

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On 2013-11-17T14:58:53+00:00 Ben-bucksch wrote:

CONFIRMing, because the summary statement is definitely true, I've
experienced it myself.

Part of the problem seems to be that Lightning creates a lot of JS
objects that put the JS engine under great stress.

Other problems like bug 841995 (see blockers here) contribute, too.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/33

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On 2013-11-17T15:49:42+00:00 Peshko R. wrote:

(In reply to Matthew Mecca [:mmecca] from comment #32)
> (In reply to peshko.us from comment #31)
> > Even if I disable all calendars, the startup is slow. If I disable the
> > Lightning plug-in. Startup is normal.
> 
> When you say the calendars are disabled, are they just unchecked in the
> calendars list, or are they fully switched off from the calendar properties
> dialog? The checkbox in the calendar list will only prevent the calendar
> from being displayed in the view, but it will still load at startup, display
> reminders, and refresh. To completely disable the calendar you need to
> right-click the calendar in the list, click Properties, and uncheck the
> "Switch this calendar on" checkbox. A completely disabled calendar will show
> as greyed out in the calendar list.

Correct, all but one disabled in the properties. All but one grayed out
in the list. Still startup time over a minute.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/34

------------------------------------------------------------------------
On 2013-12-19T13:46:59+00:00 Richard Leger wrote:


Hi,

FYI, I am also affected by issues described in this ticket.

It was occurring with TH14+Lighting1.9.1 and it is still occurring in my 
current environment after upgrade:
- Win7 Pro 64bits SP1, Intel Core i3-2310M 2.10GHz, 4GB memory
- Thunderbird 24.2.0
- Lightning add-on 2.6.4
- Two mailboxes connected via IMAP (one of them almost empty)

With Lightning add-on disabled (and all other as well) it takes:
- ~5s for Thunderbird interface to first show up from clicking on icon to open 
it
- ~20s additional to complete any activity in status bar (check new email, 
folders, etc...)
Total: ~25s

With Lightning add-on enabled but all calendar disabled (in properties) and 
greyed out
- ~25s for Thunderbird interface to first show up from clicking on icon to open 
it
- ~20s additional to complete any activity in status bar (check new email, 
folders, etc...)
Total: ~45s

With Lightning add-on enabled, one Internet Caldav calendar enabled (in 
properties) with show reminder enabled, offline support disabled and all others 
greyed out
- ~12s for Thunderbird interface to first show up from clicking on icon to open 
it
- ~78s additional to complete any activity in status bar (Check server 
capabilities, Looking for folders, etc...) and complete loading of the 
calendar. During this time, the interface responsiveness is very poor and slow 
with (Not responding) warning appearing intermittently every 4-5s after 40s 
until completion of process. Obviously both process of Checking email and 
loading Calendar run at the same time at start-up and seems to overload the 
application to the point it become unresponsive... it looks like concurrent 
processes are not running smoothly in parallel...
Total: ~90s

Hope this info may help.
Thanks for your support.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/35

------------------------------------------------------------------------
On 2013-12-19T13:48:46+00:00 Richard Leger wrote:

Sorry I meant TH17+Lighting1.9.1 in my previous comment...

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/36

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On 2014-01-08T00:38:00+00:00 Scott-inrig wrote:

On my system (WinXP SP3, TB 24.2.0, Lightning 2.6.4) this performance
issue seems to be due to extensive disk activity in my profile's
calendar-data directory.  All this disk I/O seems to make Thunderbird
crawl, as well as adversely affecting other applications.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/37

------------------------------------------------------------------------
On 2014-02-06T21:18:19+00:00 Ymc-s wrote:

I just did a test installation with TB 24.3.0 & Lg 2.6.4.  (Win7)
I have 10 network calendars active (Google, caldav) and TB takes about 3+ 
MINUTES (!) to start. This is my daily struggle (except when i start with all 
add-ons disabled, of course, as others have reported)

For testing purposes I removed the calendar-data\cache.sqlite file and started 
TB again with all add-ons active.
It was there in a jiffy (5 secs or so) and slowly re-loaded the calendar 
entries from the network. bug no lag or startup delay.

to me this reads that it HAS to do with cache synchronization during
startup... right?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/38

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On 2014-02-07T07:41:23+00:00 Tuxyso-a wrote:

The same for me. We use TB + Lightning in a team. And the current behaviour is 
really annoyning and makes TB nearly unuseable. I am not sure but I guess the 
situation became worse since the last update. Currently I am running:
* TB 24.3.0
* Lightning 2.6.4
* Provider for Google Calendar xx
* 4 network calendars (Google, caldav)

OS: Win 7 , X64

This problem is urgent and makes TB unuseable. Click > 10 seconds >
Click > 10 seconds. After deactivation of Lightning everything runs
fast.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/39

------------------------------------------------------------------------
On 2014-02-07T12:27:38+00:00 Ben-bucksch wrote:

> After deactivation of Lightning everything runs fast.

Note that the problem gets worse over time, so a restart alone can improve 
things temporarily.
That said, Lightning does make the situation considerably worse.
This issue needs urgent attention from the Lightning owners.

Tip: Separate Lightning into its own process, by creating a second
Thunderbird process, starting it with thunderbird.exe -new-instance -P
<profilename>, and installing Lighting there, and ignoring the mail
part, effectively creating a "Sunbird".

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/40

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On 2014-02-07T15:40:52+00:00 Ymc-s wrote:

So I observed the following after yesterdays test:
after cleaning (=moving) the cache.sqlite and having TB/Lightning re-populate 
it from the net, it was only 5MB as opposed to 21MB prior to that.
TB 24 with Lightning 2.6.4  continues to start within a couple of seconds.

could it be that carbage is piling up in the .sqlite db/file ?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/41

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On 2014-02-10T23:06:07+00:00 Garrett Mitchener wrote:

Confirming the slow-down on Fedora 20.  I noticed it today when I
switched over to using CalDAV to access google calendars.  Every so
often, presumably when refreshing these calendars, Thunderbird becomes
very busy and impossible to use.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/42

------------------------------------------------------------------------
On 2014-03-05T18:55:13+00:00 Martin-anderson-h wrote:

This performance problem has been around for ages. It is probably the
only thing that could force me to go back to using Outlook, but it's
getting worse,not better, and I am on the beta channel! Sorry I can't
contribute to the code right now, but this is probably the single most
important thing to fix across both Thunderbird and Lightning because it
makes the product close to unusable. I have had 100% cpu utilisation for
ages (20+ minutes) on a high spec i7 and it's all in TB and Lightning -
and there is nothing to do!

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/43

------------------------------------------------------------------------
On 2014-03-05T21:46:35+00:00 Worcester12345 wrote:

Perhaps if Bug 401779 - Integrate Lightning Into Thunderbird by Default
and Ship Thunderbird with Lightning Enabled were actually implemented,
these slowness issues would be greatly reduced.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/44

------------------------------------------------------------------------
On 2014-03-05T22:04:52+00:00 Vseerror wrote:

(In reply to Worcester12345 from comment #44)
> Perhaps if Bug 401779 - Integrate Lightning Into Thunderbird by Default and
> Ship Thunderbird with Lightning Enabled were actually implemented, these
> slowness issues would be greatly reduced.

there are no performance related "handshaking" issues between TB and calendar 
afaik.
nor does Lightning being an addon that makes it significantly slower. 

So on what basis do you make this claim?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/45

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On 2014-03-05T23:37:30+00:00 Philipp-bugzilla wrote:

Worcester12345 has made this request on many unrelated bugs and has been
warned many times that this is unproductive and violates etiquette. He
knows the reasons why its currently not an option and I suggest to not
further respond to his comment.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/46

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On 2014-03-06T08:52:41+00:00 Richard Leger wrote:

Hi Phillip,

When you say '...he knows the reasons why it is currently not an option...' 
would you mind to add a link to referenced ressouces so other people linked to 
this ticket that are not aware of them could be made aware?
While I agree with you that nagging on unrelated toppings to the bug is counter 
productive, I must admit that I agree with Worcester12345 in some way.

>From a business (and my experience) point of view, Thunderbird is the
best suited to replace Outlook but its incapacity to manage Contacts,
Calendars, Tasks by default in a modern and performant way make the
switch over and management difficult if not a pain in certain
circumpstances, aggravated with very high quantity of data to handle.
For info there is already a plan in place to re-design Addressbook
feature from ground up to address some of Contacts issues.

Now to come back to this bug issue, would it possible to provide
guidance on how end-users encountering issue could provide better
feedback (error/bug/performance) as to help identify what is causing it
as a step forward toward a solution?

I believe that Thunderbird become unresponsive due to tasks taking too
long to complete during which UI is 'frozen' (not respinsive) maybe due
to two many concurrency (disk I/O issue, db concurrent locking, slow
server answer over network when processing remote data, etc) or else. At
this point we still don't know what is causing issue.

When Thunderbird start it may be processing too much at the same time
check email, load multiple calendars, refresh reminders, update synched
contacts, check for updates, etc... all done in the same process (no
parallell tasking, no tasks delayed) with UI becoming unresponsive until
tasks are completed.

I also noticed that sometime UI freeze suddenly and I don't now why
until the reminder windows slowly pops up and slowly list reminders...
after which UI is available again.

It could also be the way network request are processed... failure or
time out could trigger repetitive requests that finally succeed but
reducing performance. This just a thought... Not a fact.

Thank you for your assistance.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/47

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On 2014-03-06T11:24:41+00:00 Martin-anderson-h wrote:

Helpful comments from Richard.
What I can add is that when Lightning is referencing external calendars it can 
consume huge amounts of CPU for no apparent reason, removing these references 
certainly seems to reduce this behaviour. 

Startup is still very slow though. I have a "clean" Thunderbird running
under W8 with no Lightning and it starts in about 20 seconds. A similar
one under XP (which I have been using for ages) takes 2-3 minutes to
show the list of folders and several minutes more to show the first
messages - and I can't do anything until then! So lets say a startup
time of 5-8 minutes. Disabling Lightning reduces this to about 30-40
seconds. Frankly I would be totally happy if Lightning did nothing at
all until TBird was up properly.

Hardware: Intel i7 with 20Gb memory 2Tb of disk with plenty spare, so
it's not a hardware problem!

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/48

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On 2014-03-06T11:34:17+00:00 Travist-g wrote:

I am running Win7 Intel i& with 16 GB ram, 240GB SSD and then 2 TB data
drive.

After changing keyboard and mouse from wireless back to wired - TB
24.3.0 Lightning 2.6.4 plus 14 other add-ons, 6 different email
addresses etc and years of history with over 500 folders - TB loads in 5
seconds

Tried everything to get it working before and was superbly slow and
blowing up all the time.  This happened just before Christmas 2013 and
after trying everything I could possibly think off- I changed a wired
mouse and what a difference- so I bought new wired stuff- and everything
is working really well to date!

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/49

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On 2014-03-06T12:18:10+00:00 Martin-anderson-h wrote:

travist, I'm delighted, but I have a real problem with your post. I have done a 
lot of timings on TB. 5 seconds is faster than a completely clean TB with no 
accounts can load on a machine at least as powerful as yours. OK the SSD could 
make a difference, but not to the level you are suggesting. 
In any even I have no wireless anything so that is clearly not the problem.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/50

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On 2014-03-06T12:42:24+00:00 Richard Leger wrote:

@travist
Emails are not the issue.
How many caldav remote calendars do you have set up?

SSD would necessarily improve performance over traditional HDD.
If disk I/O issue may be the reason SDD speed increase could compensate.
I plan to migrate to SSD at some point I'll see if it make a difference.

Definitely not wireless keyboard/mouse issue I use a laptop toshiba
portege r830-139.

Problem with (or over use of disk), memory, cpu are not to be excluded.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/51

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On 2014-03-06T15:56:45+00:00 Philipp-bugzilla wrote:

Hi folks,

you can read a bit about it in bug 401779. The short version is that
there are still to many issues in Lightning that would negatively affect
Thunderbird's stability and performance. Then there will be various
issues to take care of during integration, for example the massive
amount of new localized strings that Thunderbird localizers will have to
take care of. There are far more localizations for Thunderbird than
there are for Lightning. Also, we don't have enough contributors to
guarantee regular regression fixes and strong module ownership.

The performance issue is not a new one, I am mostly aware what needs to
be done to fix the issues. The problem is that the technical steps to do
it are not trivial. Here is a short and incomplete list:

* Rewrite the storage provider to use asynchronous SQL statements (bug 498968, 
bug 501689)
* Rewrite parts of the calendar views to use more efficient data structures and 
less redraws (bug 924865)
* Switch most providers to enable offline support by default (bug 462277)
* Make some other processing parts asynchronous or have them use web workers 
(no specific bug)
* Switch to ical.js so we can remove some abstraction that is causing slowdowns 
(bug 978570, bug 685884)
* Move occurrence generation into a worker,

These bugs alone could well cost a few full time developers multiple
months of work. We don't have those kinds of resources. Aside from that,
there are also short term bugs that need to be taken care of, i.e
regressions due to platform changes, or the unloved improving unit test
coverage, which is again a requirement to make such large changes as
above.

The issue is definitely not network performance, unless you have a lot
of events and "Offline Support" is disabled. I don't think its a disk
I/O problem, especially since we have WAL enabled (bug 918175). The
biggest issue will be all the synchronous code that is blocking the UI.
All the nice new asynchronous features were not there from the beginning
and lots of things weren't refactored when they were made available.
Back in/before Lightning 1.0, there were no web workers, no
Task.jsm/Promise.jsm and the asynchronous SQL api also hasn't been there
forever.

Now I'd love to give you an action plan what you can do to help, but
unless you are able to tackle any of the above issues, there is nothing
I can say that I think will be satisfying for you. Of course, we need
every hand we can get (even non-developers). The more independent you
can work, the better. If you are good at writing blog articles and can
keep an eye on what is going on at the calendar project, thats something
that could save a little of my time, as well as keep people informed. If
you've been reading a little on bugzilla you can also see that for most
of the UNCONFIRMED bugs there are really but a few canned responses that
need to be given to figure out if its a real issue (NEW) or just a
support issue that needs a few comforting words (WORKSFORME). Doing that
doesn't require you to read code, just being able to understand
technical terms and reading a few logs is enough. What else do we need?
Developers, UI Designers, beta testers, developers.

I hope this clarifies some of the performance issues and gives you a
better picture whats missing for great Lightning performance, and in
turn for making Lightning an integrated part of Thunderbird.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/52

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On 2014-03-06T15:57:26+00:00 Philipp-bugzilla wrote:

Actually that turned out to be the long version :)

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/53

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On 2014-03-06T16:16:50+00:00 Ssitter wrote:

> The issue is definitely not network performance, unless you have a lot of
> events and "Offline Support" is disabled. I don't think its a disk I/O
> problem, especially since we have WAL enabled (bug 918175). ...

WAL is only enabled in Lightning 2.9 and newer. If you are using network
calendars and if you have enabled the "Offline Support" feature you
could test Thunderbird 27 Beta + Lightning 2.9 Beta (or Thunderbird 28
Beta + Lightning 3.0 Beta) for improved performance. WAL should fix the
problem as reported in e.g. Bug 841508.

In addition you can try to reduce the work that has to be done by
Lightning. For example switch the filter in the Find Events bar from
"All" to something limited like "Current Month". This should reduce the
number of calendars items that must be downloaded and processed by
Lightning. Same applies for the task filter in Today Pane and task
filter in Tasks Tab.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/54

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On 2014-03-06T16:33:14+00:00 Ben-bucksch wrote:

Everybody: Integrating Calendar into Thunderbird will only make this
problem worse. Right now, the only workaround is to separate Thunderbird
and Lightning and run them in different profiles. That makes the problem
barely tolerable, even if still really disruptive for work. With both in
the same profile, Thunderbird was entirely, completely unusable. So, any
argument "Lightning should be integrated into Thunderbird" is totally
wrongheaded here.

In fact, this bug MUST be fixed BEFORE we can even consider such a move,
or we will kill our userbase by making Thunderbird unusable.

Please stop discussing this topic here, because it's completely offtopic
here. Remember the bugzilla etiquette.
<http://bugzilla.mozilla.org/page.cgi?id=etiquette.html>

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/55

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On 2014-03-06T21:33:36+00:00 Richard Leger wrote:

Thank you all for your time, feedback and good work.

@Phillip
Thanks for the long detailed clear post.
It does help to get to understand the current issue and state of play/path 
toward possible solution.
Sad to hear that you lack ressources to tackle those long pending and complex 
bugs.
For the moment I have other projects at hand but I'll see in the future if I 
can provide any help to have performance related issues sorted.

@Stefan
Thanks for the tips, I'll give it a try.
Though I'll probably wait for stable version of TH 27/28 + LI 2.9/3.0 before 
trying as this is my work machine ;-)

@Ben
Thank you for the bugzilla etiquette reminder. 
I think here we all have in mind (at heart) to improve TH performance and 
expand userbase.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/56

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On 2014-03-07T08:45:58+00:00 Richard Leger wrote:

FYI, I enabled only three remote caldav calendar and activated calendar
cache support on all but don't see much improvement.

I don't have write-ahead logging (WAL) for cache.sqlite (Bug 918175) at
the moment so disk I/O problem may not be excluded in my case, but that
shall be sorted when 2.9 stable will be out ;-)

Then it will be down to:
"...The biggest issue will be all the synchronous code that is blocking the 
UI..." (from Phillip - Comment 52)
;-)

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/57

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On 2014-03-07T13:39:40+00:00 Ben-bucksch wrote:

I've got 4 ICS calendars, all on file:/// URLs. And an Intel SSD.
So neither network latency nor disk I/O are reason for the problem.

I think the problem is excessive use of JS objects and too high pressure
on the garbage collector.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/58

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On 2014-03-07T14:51:12+00:00 Martin-anderson-h wrote:

I'm going to make a suggestion that may seem inelegant at the least, but it 
would help those of us who need to use this stuff day in day out, and it 
wouldn't be a big job.
Can we have a load delay in Lightning, Ideally until TB is ready for action, 
but failing that, long enough to let TB get loaded for most users. I would 
suggest a minimum of 30 seconds perhaps longer.
Secondly, when Lightning is loading/running, is it possible to pause and yield 
(not sure what the java is for this) regularly so that it doesn't block other 
activity.
I realise this will make Lightning even slower but it should make TB faster and 
that for me would be a net win until we can get it fixed properly.
At the moment I am contemplating moving my calendar exclusively to my S3 using 
Aquamail and SPlanner so that I can disable Lightning until it allows TB to be 
more performant - it's that important to me.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/59

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On 2014-03-08T06:54:11+00:00 Wolfgang-7 wrote:

I am glad that now, after several years of waiting, this issue raises
some broader attention. I have a feeling that all these unnecessary
complications arise from the fact that someone decided to discontinue
sunbird and insist on integration of the calendar function with
thunderbird. I would be pleased if this could be just reversed:
thunderbird as one functional entity and sunbird as another. Wouldn't
that simplify everybody's life enormously?

In my impression, sunbird was the only real functional calendar
application in linux that made sense, and some time ago, the old version
stopped to work for me.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/60

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On 2014-03-08T08:49:14+00:00 Philipp-bugzilla wrote:

Releasing a full application is a whole other can of worms. It requires
much more attention than an extension. I would need to maintain our own
build machines, (beta) releases need to be done every 6 weeks, extra QA,
features need to be integrated into two different user interfaces, code
needs to be written in a way that it works over two products, etc. Aside
from that, Sunbird cannot handle email invitations, so users will still
want something that handles this situation. Doing this across apps isn't
possible unless you are using Thunderbird and we write some complicated
code to interact with it when its running. Alas, if we were to continue
to support Sunbird, then we would have to concentrate on releasing two
products, and this is precisely what we wanted to avoid when we
discontinued Sunbird.

This issue has had the same level of attention in the last years, and
with what I've explained this will not change just because a few
comments were written here. I understand you all want to know whats
going on, but this is not the right place to test theories of what would
be better. This is the last comment I will write on this subject, please
use the newsgroups (mozilla.dev.apps.calendar) for futher inquiries.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/61

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On 2014-09-29T15:40:23+00:00 Werbung-i wrote:

It sounds like this issue hast been around for quite a while now without a real 
solution. I have had it for 1 1/2 years now (with always the most recent 
version of TB and Lightning on Win7/64) - working with web interfaces instead 
of lightning and hoping for a solution with each new version of TB and 
Lightning - in vain. Reading all these posts here, it feels like the solution 
is still far away, and my technical knowledge is not large enough to really 
contribute anything to a solution (however: I can help if there are problems to 
reproduce the problem!). Therefore I am seriously thinking about the use of 
Thunderbird which also seems to have new small but annoying issues with every 
new version.
It would be great to have some kind of a timeline for this issue. I really 
can't use Thunderbird like this, and I am thinking of switching back to Outlook 
- which would be a very sad transition, but I know no other really usable 
solution.
My feeling ist: Wouldn't it make much more sense to really develop one stable 
version of Thunderbird instead of coming out with new versions every few weeks? 
I have the feeling that both Thunderbird and Firefox kind of degraded since 
Mozilla decided to increase the pace for new versions - and this persistence of 
such a serious problem is really sad. Sorry to say that.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/62

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On 2014-10-07T16:56:40+00:00 E-bugzilla wrote:

This might not help, but I suddenly had this issue today out of the blue
- I was prompted for my Google ID and Password, presumably to help
synchronize my Gmail calendar with Thunderbird (not sure why it suddenly
prompted, though) and then the 5-second pauses began.  Made Thunderbird
practically unusable.

I managed to the Lightning extension, then restarted Thunderbird and all
was fine.

Then, something odd: I went into Thunderbird's "About" dialog and it
tried to automatically update the program, but got stuck and never went
beyond the "installing" message.  My guess is that this was the case for
months, as my version of TB was 26.x but the latest version turned out
to be 31.1.2 when I manually checked on the Mozilla website.

So, I downloaded the latest TB and installed over my current
installation, then did likewise for the latest version of Lightning.
Started TB and everything was working as expected, then installed the
Provider for Google Calendar extension within TB and restarted.
Integrated my Google Calendar back into Lightning via the new add-on (as
opposed to using CalDev).  UI performance is back to normal and my
Google Calendar is properly integrated into the local Lightning view
within Thunderbird.

I realize this situation does not cover all issues mentioned within this
bug, but hope it helps a bit.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/63

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On 2014-10-11T10:40:51+00:00 Imreoliver-kozak wrote:

I have this bug with Lightning 3.3.1 on Thunderbird 31.1.2.

When writing new messages, Thunderbird hangs for 3-5 seconds, every 30
seconds. Uninstalling Lightning solves the problem.

As I see this bug had been around since 2012, and it is not solved, this
makes me seriously reconsider using Thunderbird.

Since the price of Outlook has dropped significantly, I might just go
back to Outlook altogether.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/64

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On 2014-10-11T18:43:08+00:00 Montypython456 wrote:

(In reply to bugzilla from comment #63)
> This might not help, but I suddenly had this issue today out of the blue - I
> was prompted for my Google ID and Password, presumably to help synchronize
> my Gmail calendar with Thunderbird (not sure why it suddenly prompted,
> though) and then the 5-second pauses began.  Made Thunderbird practically
> unusable.
> 
> I managed to the Lightning extension, then restarted Thunderbird and all was
> fine.
> 
> Then, something odd: I went into Thunderbird's "About" dialog and it tried
> to automatically update the program, but got stuck and never went beyond the
> "installing" message.  My guess is that this was the case for months, as my
> version of TB was 26.x but the latest version turned out to be 31.1.2 when I
> manually checked on the Mozilla website.
> 
> So, I downloaded the latest TB and installed over my current installation,
> then did likewise for the latest version of Lightning.  Started TB and
> everything was working as expected, then installed the Provider for Google
> Calendar extension within TB and restarted.  Integrated my Google Calendar
> back into Lightning via the new add-on (as opposed to using CalDev).  UI
> performance is back to normal and my Google Calendar is properly integrated
> into the local Lightning view within Thunderbird.
> 
> I realize this situation does not cover all issues mentioned within this
> bug, but hope it helps a bit.

Thanks bugzi...@ooofest.com, that worked for me. :-)
My Thunderbird was version 24.6 (not sure about the .6, sorry) with an older 
version of Lightning; perhaps I'd disabled auto update and forgotten about it. 
When I manually updated Thunderbird to the current version (31.1.2) and allowed 
it to find compatible versions of the addons, the problem (same symptoms, slow 
loading since a few days ago, when Google asked for my login details) and with 
the new Thunderbird and addons running, the problem seems to be gone.
Hope your post brings relief to many other people. :-)
(Windows 7 32 bit, Intel core2 duo, 4gb RAM, generic system with Gigabyte MB, 
Kaspersky Internet Security 2015.)

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/65

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On 2014-10-20T07:59:57+00:00 Moritz Augustin wrote:

One potential workaround:
I am using the same set of CalDAV calendars (with lots of events, tasks and 
alarms both single and recurrent ones) on a number of machines each with 
Thunderbird/Lightning (I love it). Surprisingly on my slower computers the sync 
and Thunderbird/Lightning were fast and the GUI smooth but on my fastest 
machine each start of Thunderbird and each (also periodic) sync of the 
calendars took forever (approx. 10min...). In addition the GUI blocked each 
time I made a change to something within any calendar. What resolved the 
slowness problem on the fast machine was simply (i) to unsubscribe from all my 
(CalDAV) calendars, (ii) to restart Thunderbird and (iii) adding the same 
calendars again by subscribing them in the same way as before. Clearly if your 
problems are due to intrinsically inefficient algorithms in Lightning and your 
machine is just to slow to process those in time then this workaround does not 
help you. By the way: Emptying the cache of the calendars (they are configured 
to have offline support) did not resolve my issue; only unsubscribing, 
restarting TB and subscribing again did.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/66

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On 2014-10-20T11:57:54+00:00 Vseerror wrote:

Is anything in comment 63 deserving of a new bug report?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/67

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On 2014-10-20T14:14:48+00:00 E-bugzilla wrote:

(In reply to Wayne Mery (:wsmwk) from comment #67)
> Is anything in comment 63 deserving of a new bug report?

I haven't looked to see if Thunderbird update bug reports exist, which
would seem to be the most obvious issue that I encountered.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/68

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On 2014-10-20T16:57:05+00:00 Ssitter wrote:

Lightning problems described in comment 63 might be caused by the broken
Provider for Google Calendar 1.0 release or the access problems in the
days after due to quota limit. Don't think any of this deserves a new
bug report as they ought to be fixed now.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/69

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On 2014-10-22T14:05:48+00:00 Worcester12345 wrote:

(In reply to Stefan Sitter from comment #69)
> Lightning problems described in comment 63 might be caused by the broken
> Provider for Google Calendar 1.0 release or the access problems in the days
> after due to quota limit. Don't think any of this deserves a new bug report
> as they ought to be fixed now.

Not fixed yet.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/70

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On 2014-10-22T15:28:27+00:00 Ssitter wrote:

For support issues regarding the Provider for Google Calendar extension
please take a look at its support site
<https://groups.google.com/forum/#!forum/provider-for-google-calendar>.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/71

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On 2015-05-03T01:58:32+00:00 Vseerror wrote:

If you see slowness while using Thunderbird version 31, 38 or newer
please post the URL from doing a profile while the problem is progress,
per https://developer.mozilla.org/en-
US/docs/Mozilla/Performance/Reporting_a_Thunderbird_Performance_Problem_with_G

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/72

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On 2015-06-27T13:43:28+00:00 Pecsabi wrote:

Hi,
I use Thunderbird 38.0.1 with Lightning 4.0.0.1. Every time I start 
Thunderbird, it starts running the CPU at 100% and for a minute I can't do 
anything with it. Occasionally it freezes much after start-up as well, but only 
if Lightning is enabled. With Gecko Profiler, I uploaded a dump file to 
http://people.mozilla.org/~bgirard/cleopatra/?1435411209547#report=436abe9ed418a2e2807f29f3c1a1f97faeed94ad
 which was made right after start-up. Is there anyone else experiencing this 
with the new Lightning? Can you reproduce the problem?
Thank you for your help.
Csaba

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/76

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On 2015-06-27T17:03:07+00:00 Philipp-bugzilla wrote:

Hi Peter, thanks for uploading the profiler dump. The dump doesn't
really show anything out of the ordinary, searching for alarms and
loading the views are the items with most time spent in. If you are
using the Provider for Google Calendar, please unsubscribe from the
Birthday calendar. If you are using other calendars, can you let us know
which? If you have a lot of old items that you no longer need, it would
help to delete old items. I can understand this might not be wanted
though. Also, if you have the event view set to "All Events", can you
switch this to something else, e.g. events in the next 14 days?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/77

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On 2015-06-27T20:41:27+00:00 Pecsabi wrote:

Hi Philipp, thank you for the quick answer. I unsubscribed from the
birthday calendar, and it fixed the problem indeed. Not long ago, I was
still using Lightning 3, and I didn't experience any such problems with
that. Will this be fixed at some point in the new version, or should I
rather find an other way to get notified about the birthdays? Cheers

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/78

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On 2015-06-27T23:38:35+00:00 Philipp-bugzilla wrote:

I will take a look at this in bug 1169062

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/79

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On 2015-07-04T19:11:13+00:00 Vseerror wrote:

Ralf reports ... issue is - nearly - gone for me. I assume this is
depending on splitting big calendar in smaller ones. I'm also removing
alarm-setting from past-events.solved his issues by splitting big
calendar in smaller ones.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/80

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On 2015-07-31T11:37:20+00:00 Anders610m wrote:

I can confirm that the single step of unsubscribing from the Birthday
calendar brings startup time down from minutes (3-4!) to seconds.

This has been a huge frustration for years!

On the other hand, I would really like to have the Birthdays calendar...

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/81

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On 2015-08-05T17:05:01+00:00 Vseerror wrote:

We have here so many comments that are unanalyzed and in some cases
"incomplete" that this has essentially become a mirror of the meta bug
441710, making this essentially an unactionable placeholder bug. We
should await results of some of the bugs mentioned in comment 52 whose
symptoms for some comments here a closer match than this bug summary,
and also bug 441710, which includes bug 753343 which shares with this
bug the symptom of jank/choppiness during compose. (But this bug lacks
mention of high memory usage which is a prime symptoms of bug 753343. So
hard to say if these share the same root cause - linking just in case.)

Note also, the original reporter, krt, stopped using calendar couple
years ago. So we won't be hearing from him.

Volunteers welcome to assist Fallen and other developers in making
patches.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/82

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On 2015-09-16T12:24:48+00:00 Adrianoseie wrote:

Hi,

I have the same problem on Fedora 22
Thunderbird 38.2.0

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/83

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On 2015-09-16T12:26:19+00:00 Adrianoseie wrote:

Its very slow and sometimes it craches

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/84

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On 2015-09-16T13:00:48+00:00 Adrianoseie wrote:

When I disable Lightning 4.0.2 it works fine

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/85

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On 2015-09-16T13:20:17+00:00 Ssitter wrote:

Please keep this bug for Lightning related problems. The hang in
Thunderbird 38.2 is a known problem and is not related to Lightning. The
cause for the Thunderbird problem is known and a fix is in work for
38.3, see Bug 1196662. I'd like to ask you to not add comments that
don't provide new information.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/86

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On 2015-10-05T03:34:41+00:00 Quiet Dragon wrote:

(In reply to Ben Bucksch (:BenB) from comment #40)
> > After deactivation of Lightning everything runs fast.
> 
> Note that the problem gets worse over time, so a restart alone can improve
> things temporarily.
> That said, Lightning does make the situation considerably worse.
> This issue needs urgent attention from the Lightning owners.
> 
> Tip: Separate Lightning into its own process, by creating a second
> Thunderbird process, starting it with thunderbird.exe -new-instance -P
> <profilename>, and installing Lighting there, and ignoring the mail part,
> effectively creating a "Sunbird".

The combination of Thunderbird, Lightning and the Google Calendar
Provider is very attractive, so it's a real pity that it is pretty much
practically useless at present.

This suggestion is not a bad compromise, hiding the underlying issues
enough to make the platform usable. Here is what I did:

1. Create a new profile (eg Calendar)
2. Launch Thunderbird with --new-instance -P Calendar
3. Install Lightning, Google Calendar Provider, and Lightbird
4. Restart with --new-instance -P Calendar -calendar for a calendar only user 
experience

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/87

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On 2015-10-05T10:43:12+00:00 piotrek wrote:

i confirm: disabling lightning (4.0.2) eliminates the problem. but with 
lightning enabled thunderbird is almost unusable. 
if it's so hard to find the problem maybe it would be a good idea to add some 
kind of profiles into the thunderbird. when user feels some problems, he turns 
on the profiler and call stack is being sampled. it should help find out which 
part consumes cpu

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/88

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On 2015-10-05T11:26:49+00:00 Wolfgang-7 wrote:

I don't know about others, but for me this problem has disappeared a
long time ago. Comments to this thread seem to pop up with long
intervals for some reason.

I currently use thunderbird 38.3.0 on a linux machine, with lightning
4.0.3 and also lightbird 0.5, and everything is just fine.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/89

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On 2015-10-08T04:44:39+00:00 Quiet Dragon wrote:

I stumbled across Philipp Kewisch's comments:

https://bugzilla.mozilla.org/show_bug.cgi?id=733039#c74
https://addons.mozilla.org/en-US/thunderbird/addon/provider-for-google-calendar/reviews/743276/

I followed the advice: "please unsubscribe from the Birthdays calendar"

I unsubscribed from anything with "birthday" in its name, and I was very
pleasantly surprised by the result. I have Thunderbird, Lightning and
Google Calendar Provider in a single profile and about 9 calendars in
play (definitely no birthday calendars of any kind) and the application
remains usable and responsive.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/90

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On 2015-10-22T07:43:46+00:00 Sven wrote:

I experiencing equivalent problems.
I run Thunderbird 38.3.0 on Fedora 22.

When Thunderbird runs longer than a day (and my Laptop is going into
suspend für several hours in between, if that has any influence), it
becomes very laggy too.

I followed several suggestions on this page and some helped a bit. But
the problem itself persists. The problem is getting worse, if you have
some calendars, that are not accessible (due to DNS, VPN, WiFi or
similar).

The only chance to speed it up again is to quit and restart Thunderbird.

If I restart Thunderbird, the file "<profile>/calendar-data/cache.sqlite-wal" 
will be removed and
is recreated upon restart. After this, I can use Thunderbird for some hours 
without problems.

I think the developers should investigate the behavior of Lightning, if it has 
problems to connect to
the CalDav servers...

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/91

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On 2015-10-24T02:50:20+00:00 Quiet Dragon wrote:

(In reply to quiet.dragon from comment #87)
> I followed the advice: "please unsubscribe from the Birthdays calendar"

I've been running with this configuration for about a week now. I start
Thunderbird, and it stays running for days.

On my desktop Ubuntu system, the Thunderbird+Lightning+Google Provider
continues to function well. I have not had to restart Thunderbird since
I deleted the birthday calendars.

On my OSX laptop system, the performance started off well, but degraded
slowly over the week with the occasional long delays in response to key
strokes. The laptop is mobile moving from one WiFi system to another,
but it's not possible to say if the intermittent connectivity is the
root cause of the degradation.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/92

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On 2016-03-30T16:46:40+00:00 David Albert wrote:

Another datapoint: this problem only manifests on Windows.  I run
Thunderbird+Lightning on multiple Linux platforms with no problem,
however on Windows, TBird+Lightning+Provider for Google Calendar = huge
startup delays + frequent UI blocked for several seconds at a time.
This suggests a blocking call to access the calendar API is taking place
in the UI thread.

A good workaround for windows users is the Google Calendar Tab add-on
for Thunderbird.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/93

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On 2016-03-30T16:51:18+00:00 Bugzilla-mozilla-u wrote:

On the other hand…
I do experience this issue on Linux very much (on a quite recent machine with 
really enough CPU/RAM/IO bandwidth available).
Further, the problem also occurs with subscribed calendars other than Google's 
(i.e. also w/o being subscribed to Google calendars but CalDAV ones etc.).

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/94

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On 2016-03-30T17:26:44+00:00 Ben-bucksch wrote:

> this problem only manifests on Windows.

Wrong. I see it on Linux, very strongly.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/95

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On 2016-03-30T17:39:42+00:00 Sven wrote:

As an update to my previous post, the problem still persists under Linux 
(Fedora 23)
using Thunderbird 38.6.0 (with Lightning 4.0.6) with several ical and CalDav 
calendars
(to three different caldav servers).

I disabled the ThunderBirthDay Addon, because it was almost unusable with it 
enabled.
It works fine for several hours, but I have to restart it once a day to be 
usable
(and responsive) again.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/96

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On 2016-03-30T18:15:12+00:00 Fry-kun wrote:

Is there some log or debug tool that Thunderbird has that we can look at?
Since the issue only happens after hours of use it's really annoying to 
reproduce -- I assume this is why there hasn't been any progress in all this 
time


P.S.
Fedora 23, 38.7.1
For some reason not sluggish today...

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/97

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On 2016-04-01T20:24:35+00:00 Fry-kun wrote:

So I haven't seen Thunderbird behave poorly the last few days. What I
did was run "Repair Folder" on each folder I have. The same session did
not improve, IIRC, so I promptly forgot about it.. but the next day the
slowness wasn't there.

There really should be a button to repair all folders... and maybe some
kind of check for "slow to access a folder", which would trigger a
suggestion to the user to repair it (similar to how Compress Folders
works)

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/98

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On 2016-04-02T08:32:29+00:00 Philipp-bugzilla wrote:

Ben, was making this a security bug done on purpose? I admit I didn't
re-read all 95 comments but maybe you can comment on this.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/99

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On 2016-04-04T06:45:07+00:00 Dveditz wrote:

Ben emailed and marking it secure/hidden was a mistake, he meant to
check the "Restrict commenting on this bug to users in the editbugs
group" box.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1458593/comments/100

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to thunderbird in Ubuntu.
https://bugs.launchpad.net/bugs/1458593

Title:
  Super-slow startup and sluggish performance when using the GCAL
  provider

Status in Mozilla Thunderbird:
  Confirmed
Status in thunderbird package in Ubuntu:
  Invalid

Bug description:
  After upgrading to 31.7 I noticed start-up times around 30 seconds
  when the Google provider (version 1.0.4) in connection with Lightning
  is used (I disabled the plugin temporarily for root cause analysis).
  Downgrading TB to 31.6  didn't solve the problem, neither did
  downgrading the Provider plugin to 1.0.3.

  Let me know if more details are needed.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: thunderbird 1:31.7.0+build1-0ubuntu0.15.04.1
  Uname: Linux 4.0.1-040001-generic x86_64
  NonfreeKernelModules: wl
  AddonCompatCheckDisabled: False
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  root        751 F.... pommed
                        christoph   5608 F.... pulseaudio
  BuildID: 20150511105107
  Channel: Unavailable
  Date: Mon May 25 16:36:15 2015
  ForcedLayersAccel: False
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
  InstallationDate: Installed on 2014-04-26 (394 days ago)
  InstallationMedia: Lubuntu 14.04 LTS "Trusty Tahr" - Release amd64 
(20140416.2)
  IpRoute:
   default via 192.168.2.1 dev wlan0  proto static  metric 1024 
   192.168.2.0/24 dev wlan0  proto kernel  scope link  src 192.168.2.33
  NoProfiles: True
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No 
PulseAudio daemon running, or not running as session daemon.
  RunningIncompatibleAddons: False
  SourcePackage: thunderbird
  UpgradeStatus: Upgraded to vivid on 2015-04-24 (30 days ago)
  dmi.bios.date: 01/24/12
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP81.88Z.0047.B27.1201241646
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-94245B3640C91C81
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookPro8,1
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-94245B3640C91C81
  dmi.modalias: 
dmi:bvnAppleInc.:bvrMBP81.88Z.0047.B27.1201241646:bd01/24/12:svnAppleInc.:pnMacBookPro8,1:pvr1.0:rvnAppleInc.:rnMac-94245B3640C91C81:rvrMacBookPro8,1:cvnAppleInc.:ct10:cvrMac-94245B3640C91C81:
  dmi.product.name: MacBookPro8,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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