[Bug 88320] Re: Feisty: Firefox/SVG re-rendered (slow) during a tab-switch.

[Alexander Sack]

svg rendering probably has improved a lot in ffox 3. however ffox 2 wont
see any performance fixes anymore.

** Changed in: firefox (Ubuntu)
   Status: Incomplete => Won't Fix

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[Bug 88320] Re: Feisty: Firefox/SVG re-rendered (slow) during a tab-switch.

[Eric Lemoine]

I've also experienced SVG-related problems with Firefox 2.0.0.3 Feisty.

For example, try drawing a polygon using
. The polygon
isn't rendered until you switch tab and come back. The problem does
*not* exist on mozilla.org's Firefox 2.0.0.3.

Is my problem related to the bug posted here?

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[Bug 88320] Re: Feisty: Firefox/SVG re-rendered (slow) during a tab-switch.

[Alexander Sack]

Andy, is this still the case in latest feisty (2.0.0.3-something)
firefox for you?

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[Bug 88320] Re: Feisty: Firefox/SVG re-rendered (slow) during a tab-switch.

[Andy Brook]

Alex: I tried latest 2.0.0.3 for both edgy and fiesty, its the same on
each OS release.  [I have 200 odd fiesty updates pending from yesterday
- waiting a collegue to give me the boot-ok all-clear :) If it makes a
difference I'll comment.

The format for this application is Java/JSP web-application running on 
Edgy/Jboss/SUN150 JRE.  It gets user data from Active Directory and other 
clocking systems.  
The struts code forwards to a custom JSP which outputs an SVG.  To work around 
windows 2000/IE6 SVG rendering bugs I EMBED the content in a web page.  All 
components are computed from some hard coded offsets so that the two level tree 
automatically lays out.

To give an better idea of what I'm rendering I've attached a screen
grab, from this you should be able to see the following:

[misc]
4 flag images
18 vertical tics
1 horizonal tick
2 Text objects (refresh and Note)
1 mouse status (click/drag) indicator
background javascript that loops ever 10S (used for a 5minute refresh countdown)

[user details x1]
1 user image 
10 text objects

[ hierarchy details x18]
1 background box, gradient shaded (the white bar is a known bug in the gradient 
code)
1 transparent hit-box (outlined) in top 55% of each
1 user sillouette image
1 small telephone icon
7 text objects (obscured)

The SVG makes use of

-
To clarify: when I say switching tabs I talking about switching from a non-SVG 
content page back to my generated SVG.

If I leave the SVG unscrolled, it appears left aligned, with 50% not
visible (browser is on one screen at 1600x1200) off the right hand part
of the EMBED.  Switching to other tabs and back introduces no real delay
in rendering on fiesty: (My main dev box, Opteron 2.0Ghz, 3GB ram) .  If
I scroll right so that the user info section (top left) is half off-
screen to the left, when I switch tabs and back to the SVG, it takes a
full second or so to render.  Does the SVG render render at 0,0 and then
do some kind of offset re-render? Is the browser responsible for
positioning EMBEDed content?  I don't know.

On edgy (HP laptop, AMD64 2.20 GHz 2GB) I seem to get the delay
switching tabs irrespective of whether the image is far left or not.
Fiesty seems to have improved the performance for left aligned  EMBEDed
SVGs.

---

I'll try and put an example WAR together demoing the issue with
contrived data, hopefully in the next few days.

** Attachment added: "Image showing the SVG output (two screens needed for full 
size)"
   http://librarian.launchpad.net/7125053/example.gif

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[Bug 88320] Re: Feisty: Firefox/SVG re-rendered (slow) during a tab-switch.

[John Vivirito]

Can you give us an in depth description of how you reproduce this
including any links that it happens on.

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[Bug 88320] Re: Feisty: Firefox/SVG re-rendered (slow) during a tab-switch.

[Andy Brook]

That example does work fine I agree.  On further investigation this is
an issue on Edgy as well as Fiesty.  The major difference the example
given and my SVG is that mine is loaded via an Embed TAG, and can be
quite wide (fills 1600x) making use of many computed rectangles,
shadings, images and text (its an org chart).

I wonder of the complexity of the SVG is on the edge of being rendered
quickly enough.  Hardware is Opteron 248, system has 3GB ram...


If the SVG is embedded (ebmed tag) and the scrollbar is used to view half way 
accross the rendered image, switching tabs does seem to take a second or so 
more.  

My generated image can be rendered with no delay if scrolled far left
(origin), but if I start to scroll right (and test tab switching), after
about 5cm of scroll the 'delay' described in this bug kicks in.
Something about changing the viewport of an embedded image?

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[Bug 88320] Re: Feisty: Firefox/SVG re-rendered (slow) during a tab-switch.

[Freddy Martinez]

can't seem to reproduce on Feisty Beta (up to date as of march 25) and
testing with
http://upload.wikimedia.org/wikipedia/commons/thumb/1/15/Svg.svg/617px-
Svg.svg.png

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[Bug 88320] Re: Feisty: Firefox/SVG re-rendered (slow) during a tab-switch.

[John Vivirito]

** Changed in: firefox (Ubuntu)
   Importance: Undecided => Low
 Assignee: (unassigned) => Mozilla Bugs
   Status: Unconfirmed => Needs Info

** Tags added: mt-needtester

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