Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
-+-
 Reporter:  cypherpunks  |  Owner:  tbb-
 Type:  defect   |  team
 Priority:  Medium   | Status:
Component:  Applications/Tor Browser |  assigned
 Severity:  Normal   |  Milestone:
 Keywords:  tbb-6.0-issues, tbb-usability, tbb-  |Version:
  performance, GeorgKoppen201606,| Resolution:
  TorBrowserTeam201606   |  Actual Points:
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by cypherpunks):

 https://lists.torproject.org/pipermail/tor-talk/2016-August/041923.html

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
-+-
 Reporter:  cypherpunks  |  Owner:  tbb-
 Type:  defect   |  team
 Priority:  Medium   | Status:
Component:  Applications/Tor Browser |  assigned
 Severity:  Normal   |  Milestone:
 Keywords:  tbb-6.0-issues, tbb-usability, tbb-  |Version:
  performance, GeorgKoppen201606,| Resolution:
  TorBrowserTeam201606   |  Actual Points:
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-
Changes (by gk):

 * keywords:
 tbb-6.0-issues, tbb-usability, tbb-performance, GeorgKoppen201606,
 TorBrowserTeam201606R
 =>
 tbb-6.0-issues, tbb-usability, tbb-performance, GeorgKoppen201606,
 TorBrowserTeam201606
 * status:  needs_review => assigned


Comment:

 Applied to tor-browser-45.2.0esr-6.5-1 and tor-browser-45.2.0esr-6.0-1
 (commits 7d0974ce3580b26f24f9363404e5d36cc584e254 and
 979f170107821ca481870c01820d628e55d47913)

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
-+-
 Reporter:  cypherpunks  |  Owner:  tbb-
 Type:  defect   |  team
 Priority:  Medium   | Status:
Component:  Applications/Tor Browser |  needs_review
 Severity:  Normal   |  Milestone:
 Keywords:  tbb-6.0-issues, tbb-usability, tbb-  |Version:
  performance, GeorgKoppen201606,| Resolution:
  TorBrowserTeam201606R  |  Actual Points:
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by mcs):

 r=brade, r=mcs

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
-+-
 Reporter:  cypherpunks  |  Owner:  tbb-
 Type:  defect   |  team
 Priority:  Medium   | Status:
Component:  Applications/Tor Browser |  needs_review
 Severity:  Normal   |  Milestone:
 Keywords:  tbb-6.0-issues, tbb-usability, tbb-  |Version:
  performance, GeorgKoppen201606,| Resolution:
  TorBrowserTeam201606R  |  Actual Points:
Parent ID:   | Points:
 Reviewer:   |Sponsor:
-+-
Changes (by gk):

 * keywords:  tbb-6.0-issues, tbb-usability, tbb-performance =>
 tbb-6.0-issues, tbb-usability, tbb-performance, GeorgKoppen201606,
 TorBrowserTeam201606R
 * status:  needs_information => needs_review


Comment:

 Alright, bug_19276_v2 (https://gitweb.torproject.org/user/gk/tor-
 browser.git/commit/?h=bug_19276_v2) sets the Xrender pref to `false`. We
 should still investigate whether we can find a solution to the problem in
 comment:10.

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
-+-
 Reporter:  cypherpunks  |  Owner:  tbb-
 Type:  defect   |  team
 Priority:  Medium   | Status:
Component:  Applications/Tor Browser |  needs_information
 Severity:  Normal   |  Milestone:
 Keywords:  tbb-6.0-issues, tbb-usability, tbb-  |Version:
  performance| Resolution:
Parent ID:   |  Actual Points:
 Reviewer:   | Points:
 |Sponsor:
-+-

Comment (by yawning):

 Replying to [comment:16 49ax56xr36]:
 > Replying to [comment:15 yawning]:
 > > Try setting `layers.offmainthreadcomposition.enabled` to `false`.
 Behavior is noticeably different on my Poulsbo Atom box (using the open
 source 2D only drivers).
 >
 > The default for this setting in 6.0.1 is =false and that's what has been
 in effect.  Set it to =true and it works better both with xrender=false
 and xrender=true.  Seems a proper result as the event loop is presumably
 separated from rendering and can respond to mouse and keyboard events even
 while the browser is bogged down rendering.

 That's the idea behind it, yes, though it does sacrifice performance since
 there's extra overhead involved in making it multithreaded (The default,
 with a clean 6.0.1 installation is most certainly to enable it, not sure
 why it was disabled for you).

 > I'm keeping 'offmainthreadcomposition' active and leaving 'xrender'
 disabled.
 >
 > Disabling 'xrender' by default is potentially a diffcult choice--have no
 position on it.  But considering that worst-case beahavior with
 xrender=true is terrible and worst-case with xrender=false is not-bad it
 might be a good idea.

 I don't personally think it's that hard of a call to make, since upstream
 has decided the path to take and the next ESR will change the behavior.
 Till then, I would be for disabling Xrender in the next point release and
 alpha series since it's probably going to help more than it hurts.

 > Or maybe see if there's a "dumb bug" in there that can be fixed.  Making
 the same calls multiple times or in a non-optimal order come to mind.

 My ~6 year old netbook being slow isn't enough motivation for me to debug
 an upstream graphics issue (perf on 45.1.1 ESR is equally horrible).
 Apparently the code is all getting changed again anyway (to use Skia
 instead of cairo).

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
-+-
 Reporter:  cypherpunks  |  Owner:  tbb-
 Type:  defect   |  team
 Priority:  Medium   | Status:
Component:  Applications/Tor Browser |  needs_information
 Severity:  Normal   |  Milestone:
 Keywords:  tbb-6.0-issues, tbb-usability, tbb-  |Version:
  performance| Resolution:
Parent ID:   |  Actual Points:
 Reviewer:   | Points:
 |Sponsor:
-+-

Comment (by 49ax56xr36):

 Replying to [comment:15 yawning]:
 > Try setting `layers.offmainthreadcomposition.enabled` to `false`.
 Behavior is noticeably different on my Poulsbo Atom box (using the open
 source 2D only drivers).

 The default for this setting in 6.0.1 is =false and that's what has been
 in effect.  Set it to =true and it works better both with xrender=false
 and xrender=true.  Seems a proper result as the event loop is presumably
 separated from rendering and can respond to mouse and keyboard events even
 while the browser is bogged down rendering.

 I'm keeping 'offmainthreadcomposition' active and leaving 'xrender'
 disabled.

 Disabling 'xrender' by default is potentially a diffcult choice--have no
 position on it.  But considering that worst-case beahavior with
 xrender=true is terrible and worst-case with xrender=false is not-bad it
 might be a good idea.

 Or maybe see if there's a "dumb bug" in there that can be fixed.  Making
 the same calls multiple times or in a non-optimal order come to mind.

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
-+-
 Reporter:  cypherpunks  |  Owner:  tbb-
 Type:  defect   |  team
 Priority:  Medium   | Status:
Component:  Applications/Tor Browser |  needs_information
 Severity:  Normal   |  Milestone:
 Keywords:  tbb-6.0-issues, tbb-usability, tbb-  |Version:
  performance| Resolution:
Parent ID:   |  Actual Points:
 Reviewer:   | Points:
 |Sponsor:
-+-

Comment (by yawning):

 Replying to [comment:14 49ax56xr36]:
 > Replying to [comment:11 yawning]:
 > > Everyone that actually has the issue is leaving out "what video card
 they have, and what drivers they are using if applicable".
 >
 > nxagent -- virtual screen X-server, older version
 >
 > Don't think an actual "drivers" are in the picture here, just the screen
 virtualizing X11 NX server.

 Well, same sort of problem.  I don't think that supports any of the
 relevant acceleration methods well enough (if at all), so you're probably
 stuck on some sort of software rendering regardless.

 > Worked reasonably well with 5.5.5 and xrender=true.  Epic disaster with
 6.0.1.  Six-oh-one with xrender=false seems a bit faster than 5.5.5 with
 xrender=true, but not different enough to cause complaint.  Does seem a
 regression in the xrender code.  Reading some of the above links it
 appears xrender is a mixed proposition.  Works brilliantly on many
 targets, not-so-great on others.  Could be a dumb bug that's imperceptible
 on fast hardware.

 One thing worth looking at for your specific case is disabling the off-
 main thread compositing (Enabled in FF40, so the 6.0.x series would be the
 first Tor Browser releases to support it.  See
 https://bugzilla.mozilla.org/show_bug.cgi?id=994541).

 Try setting `layers.offmainthreadcomposition.enabled` to `false`.
 Behavior is noticeably different on my Poulsbo Atom box (using the open
 source 2D only drivers).

 Unfortunately, if I were a real Tor Browser person, I'd probably push
 against making the modified version of the pref the default even if it
 helps the 2d only configs since doing so will likely hurt more configs
 than it helps.

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
-+-
 Reporter:  cypherpunks  |  Owner:  tbb-
 Type:  defect   |  team
 Priority:  Medium   | Status:
Component:  Applications/Tor Browser |  needs_information
 Severity:  Normal   |  Milestone:
 Keywords:  tbb-6.0-issues, tbb-usability, tbb-  |Version:
  performance| Resolution:
Parent ID:   |  Actual Points:
 Reviewer:   | Points:
 |Sponsor:
-+-

Comment (by 49ax56xr36):

 Replying to [comment:11 yawning]:
 > Everyone that actually has the issue is leaving out "what video card
 they have, and what drivers they are using if applicable".

 nxagent -- virtual screen X-server, older version

 Don't think an actual "drivers" are in the picture here, just the screen
 virtualizing X11 NX server.

 Worked reasonably well with 5.5.5 and xrender=true.  Epic disaster with
 6.0.1.  Six-oh-one with xrender=false seems a bit faster than 5.5.5 with
 xrender=true, but not different enough to cause complaint.  Does seem a
 regression in the xrender code.  Reading some of the above links it
 appears xrender is a mixed proposition.  Works brilliantly on many
 targets, not-so-great on others.  Could be a dumb bug that's imperceptible
 on fast hardware.

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
-+-
 Reporter:  cypherpunks  |  Owner:  tbb-
 Type:  defect   |  team
 Priority:  Medium   | Status:
Component:  Applications/Tor Browser |  needs_information
 Severity:  Normal   |  Milestone:
 Keywords:  tbb-6.0-issues, tbb-usability, tbb-  |Version:
  performance| Resolution:
Parent ID:   |  Actual Points:
 Reviewer:   | Points:
 |Sponsor:
-+-

Comment (by 49ax56xr36):

 Replying to [comment:12 gk]:
 >
 > Does adding `layers.use-image-offscreen-surfaces` and setting it to
 `true` help?

 No perceptible difference.  Did restart Tor Browser.

 Created it as 'boolean' type, but when it was "reset" it reverted to an
 empty 'string' type before vanishing on the next restart.

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
-+-
 Reporter:  cypherpunks  |  Owner:  tbb-
 Type:  defect   |  team
 Priority:  Medium   | Status:
Component:  Applications/Tor Browser |  needs_information
 Severity:  Normal   |  Milestone:
 Keywords:  tbb-6.0-issues, tbb-usability, tbb-  |Version:
  performance| Resolution:
Parent ID:   |  Actual Points:
 Reviewer:   | Points:
 |Sponsor:
-+-

Comment (by gk):

 Replying to [comment:10 49ax56xr36]:
 > This severe regression continues to exhibit in the Advanced Certificate
 Manager dialog even with 'xrender' disabled.  Likely in other dialogs as
 well.  The disable setting may be ignored in these cases.

 Does adding `layers.use-image-offscreen-surfaces` and setting it to `true`
 help?

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
-+-
 Reporter:  cypherpunks  |  Owner:  tbb-
 Type:  defect   |  team
 Priority:  Medium   | Status:
Component:  Applications/Tor Browser |  needs_information
 Severity:  Normal   |  Milestone:
 Keywords:  tbb-6.0-issues, tbb-usability, tbb-  |Version:
  performance| Resolution:
Parent ID:   |  Actual Points:
 Reviewer:   | Points:
 |Sponsor:
-+-

Comment (by yawning):

 Everyone that actually has the issue is leaving out "what video card they
 have, and what drivers they are using if applicable".

 It would probably be good to know why the pref is different between the
 ESR release as well, but unless digging there turns up something more
 actionable, switching the pref to false by default seems like the best
 course of action.

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
-+-
 Reporter:  cypherpunks  |  Owner:  tbb-
 Type:  defect   |  team
 Priority:  Medium   | Status:
Component:  Applications/Tor Browser |  needs_information
 Severity:  Normal   |  Milestone:
 Keywords:  tbb-6.0-issues, tbb-usability, tbb-  |Version:
  performance| Resolution:
Parent ID:   |  Actual Points:
 Reviewer:   | Points:
 |Sponsor:
-+-

Comment (by 49ax56xr36):

 This severe regression continues to exhibit in the Advanced Certificate
 Manager dialog even with 'xrender' disabled.  Likely in other dialogs as
 well.  The disable setting may be ignored in these cases.

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
-+-
 Reporter:  cypherpunks  |  Owner:  tbb-
 Type:  defect   |  team
 Priority:  Medium   | Status:
Component:  Applications/Tor Browser |  needs_information
 Severity:  Normal   |  Milestone:
 Keywords:  tbb-6.0-issues, tbb-usability, tbb-  |Version:
  performance| Resolution:
Parent ID:   |  Actual Points:
 Reviewer:   | Points:
 |Sponsor:
-+-

Comment (by cypherpunks):

 Replying to [comment:7 gk]:
 > cypherpunks: Thanks for the workaround. Did 5.5.5 work for you out-of-
 the box? Might be interesting to dig a bit finding out what regressed if
 that's the case.
 5.5.5 does work out-of-the-box and has `gfx.xrender.enabled` set to `true`
 so it seems something did regress.

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
-+-
 Reporter:  cypherpunks  |  Owner:  tbb-
 Type:  defect   |  team
 Priority:  Medium   | Status:
Component:  Applications/Tor Browser |  needs_information
 Severity:  Normal   |  Milestone:
 Keywords:  tbb-6.0-issues, tbb-usability, tbb-  |Version:
  performance| Resolution:
Parent ID:   |  Actual Points:
 Reviewer:   | Points:
 |Sponsor:
-+-

Comment (by yawning):

 Replying to [comment:4 cypherpunks]:
 > Turns out issue is solved by setting `gfx.xrender.enabled` to `false`.
 Because I'm unfamiliar with the Firefox code base, i don't know what the
 preference does, what its impact is, and whether it's worth setting in TB.
 Hopefully someone else can figure this out.

 The behavior will end up being system/driver specific, since XRender
 performance depends on the driver.  That said, upstream changed the
 pref(s) fairly recently,
 https://bugzilla.mozilla.org/show_bug.cgi?id=1180942 and
 https://hg.mozilla.org/mozilla-central/rev/432ef38dab95), and has written
 off performance related regressions on systems where XRender compositing
 outperforms Cairo
 (https://bugzilla.mozilla.org/show_bug.cgi?id=1241832#c6).

 So in the mean time, the question is, do we care about systems that have
 drivers/hardware that supports XRender, but doesn't have hardware OpenGL?
 Or do we care about systems that do have hardware accelerated OpenGL more?
 The latter should be the majority...

 As a side note, the windows upstream bug is
 https://bugzilla.mozilla.org/show_bug.cgi?id=894128 (And it's totally
 orthogonal to the Linux rendering backend selection).

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
-+-
 Reporter:  cypherpunks  |  Owner:  tbb-
 Type:  defect   |  team
 Priority:  Medium   | Status:
Component:  Applications/Tor Browser |  needs_information
 Severity:  Normal   |  Milestone:
 Keywords:  tbb-6.0-issues, tbb-usability, tbb-  |Version:
  performance| Resolution:
Parent ID:   |  Actual Points:
 Reviewer:   | Points:
 |Sponsor:
-+-

Comment (by gk):

 Replying to [comment:6 bugzilla]:
 > FWIW, this is a long-standing problem of Firefox on Windows, and it's
 just getting worse with updates.

 This is a Linux issue not a Windows one.

 cypherpunks: Thanks for the workaround. Did 5.5.5 work for you out-of-the
 box? Might be interesting to dig a bit finding out what regressed if
 that's the case.

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
-+-
 Reporter:  cypherpunks  |  Owner:  tbb-
 Type:  defect   |  team
 Priority:  Medium   | Status:
Component:  Applications/Tor Browser |  needs_information
 Severity:  Normal   |  Milestone:
 Keywords:  tbb-6.0-issues, tbb-usability, tbb-  |Version:
  performance| Resolution:
Parent ID:   |  Actual Points:
 Reviewer:   | Points:
 |Sponsor:
-+-
Changes (by bugzilla):

 * keywords:  tbb-6.0-issues, tbb-usability => tbb-6.0-issues, tbb-
 usability, tbb-performance


Comment:

 FWIW, this is a long-standing problem of Firefox on Windows, and it's just
 getting worse with updates. The reason is that Mozilla doesn't test its
 products on different systems, thinking that testing on their configs is
 enough.

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
---+---
 Reporter:  cypherpunks|  Owner:  tbb-team
 Type:  defect | Status:
 Priority:  Medium |  needs_information
Component:  Applications/Tor Browser   |  Milestone:
 Severity:  Normal |Version:
 Keywords:  tbb-6.0-issues, tbb-usability  | Resolution:
Parent ID: |  Actual Points:
 Reviewer: | Points:
   |Sponsor:
---+---

Comment (by cypherpunks):

 http://www.hackermusings.com/2012/05/firefoxs-graphics-performance-on-x11/

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
---+---
 Reporter:  cypherpunks|  Owner:  tbb-team
 Type:  defect | Status:
 Priority:  Medium |  needs_information
Component:  Applications/Tor Browser   |  Milestone:
 Severity:  Normal |Version:
 Keywords:  tbb-6.0-issues, tbb-usability  | Resolution:
Parent ID: |  Actual Points:
 Reviewer: | Points:
   |Sponsor:
---+---

Comment (by cypherpunks):

 Replying to [comment:3 gk]:
 > I guess this is on a Windows OS? Which version? Do you see error output
 or something on the browser console (Ctrl + Shift + J) while scrolling?
 Sorry for not mentioning the platform. The issue occurs on a Debian
 testing box. There was nothing in the browser console besides unrelated
 messages.

 I've done some more testing to try and find why there was a difference
 between Firefox and TB. Unfortunately the previous comparison wasn't
 accurate as the Firefox instance i used was heavily modified. Using a
 clean profile made the issue appear with Firefox too so it's not TB
 specific.

 Turns out issue is solved by setting `gfx.xrender.enabled` to `false`.
 Because I'm unfamiliar with the Firefox code base, i don't know what the
 preference does, what its impact is, and whether it's worth setting in TB.
 Hopefully someone else can figure this out.

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
---+---
 Reporter:  cypherpunks|  Owner:  tbb-team
 Type:  defect | Status:
 Priority:  Medium |  needs_information
Component:  Applications/Tor Browser   |  Milestone:
 Severity:  Normal |Version:
 Keywords:  tbb-6.0-issues, tbb-usability  | Resolution:
Parent ID: |  Actual Points:
 Reviewer: | Points:
   |Sponsor:
---+---
Changes (by gk):

 * keywords:   => tbb-6.0-issues, tbb-usability
 * status:  new => needs_information


Comment:

 I guess this is on a Windows OS? Which version? Do you see error output or
 something on the browser console (Ctrl + Shift + J) while scrolling?

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
--+--
 Reporter:  cypherpunks   |  Owner:  tbb-team
 Type:  defect| Status:  new
 Priority:  Medium|  Milestone:
Component:  Applications/Tor Browser  |Version:
 Severity:  Normal| Resolution:
 Keywords:|  Actual Points:
Parent ID:| Points:
 Reviewer:|Sponsor:
--+--

Comment (by cypherpunks):

 TB 6.0.1 still has the issue.

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

Re: [tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
--+--
 Reporter:  cypherpunks   |  Owner:  tbb-team
 Type:  defect| Status:  new
 Priority:  Medium|  Milestone:
Component:  Applications/Tor Browser  |Version:
 Severity:  Normal| Resolution:
 Keywords:|  Actual Points:
Parent ID:| Points:
 Reviewer:|Sponsor:
--+--

Comment (by cypherpunks):

 FWIW `about:config` does not have the issue, so it seems to be related to
 rendered pages.

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs

[tor-bugs] #19276 [Applications/Tor Browser]: Scrolling is slow and CPU intensive

[Tor Bug Tracker & Wiki]

#19276: Scrolling is slow and CPU intensive
--+--
 Reporter:  cypherpunks   |  Owner:  tbb-team
 Type:  defect| Status:  new
 Priority:  Medium|  Milestone:
Component:  Applications/Tor Browser  |Version:
 Severity:  Normal|   Keywords:
Actual Points:|  Parent ID:
   Points:|   Reviewer:
  Sponsor:|
--+--
 Scrolling in TB 6.0 is slow and increases CPU usage to near 100%. This
 occurs on all pages, even simple internal ones such as `about:support`.

 The issue does not occur with Firefox ESR 45.1.1.

--
Ticket URL: 
Tor Bug Tracker & Wiki 
The Tor Project: anonymity online
___
tor-bugs mailing list
tor-bugs@lists.torproject.org
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs