Responsiveness & Jank Thread

[Ver Greeneyes]

(Too bad they don't automatically uplift HTML5/MSE improvements)

They might as well be - all the big fixes are being uplifted all the way to 36 with pre-approval (though they do still put up the uplift requests unless a bug is particularly critical).

[Omega X]

If MSE is shipping with Fx36 then they'll uplift unrisky fixes.

[Ver Greeneyes]

I don't know if it's just my imagination, but today's Nightly feels faster again.

Edit: Foreground tabs do, at least. Session Restore still feels really slow on my pinned tabs.

Edit2: Nevermind, still extremely slow on some websites.

[avada]

At least they fixed the throbber getting stuck all the time. (and the disappeared history/bookmarks.)

[Ver Greeneyes]

Yeah, that was related to the performance issues I was seeing. Things are much better now.

[Ver Greeneyes]

Nicholas Nethercote of Memshrink fame just landed a change that significantly reduces the amount of common font-related allocations in bug 1100738. In his own measurements, this almost tripled the loading speed of one pdf using pdfjs, and showed large gains on others. It also caused a ~12.5% increase in the score of CanvasMark, at least the version they run in automation.

[Omega X]

Hopefully that translates to common websites as well.

[Ver Greeneyes]

This should interest some of you: Project silk can now be tested on desktop Firefox on Windows and OSX. Project silk aims to increase animation smoothness (smooth as silk) by synchronizing composition with VSync. To enable the new mode, go into about:config and set gfx.vsync.compositor, gfx.vsync.hw-vsync.enabled and gfx.vsync.refreshdriver to true (then restart the browser).

Note that this does not yet work on Linux, so don't try it lest you get stuck in a crash loop! Also, the implementation on Windows depends on the DWM (Windows' compositor) being available and enabled. The browser should still work just fine with it disabled, or on Windows XP where it isn't available, but it won't be synchronized with VSync.

Also: be careful with this if you're likely to switch to an older version of Nightly, since setting these preferences (which were first introduced for B2G) will probably cause older builds to crash. The VSync source for Windows has been available for about 2 or 3 days now.

For more information, see also the project wiki page and the meta bug's dependencies.

[Zlip792]

This should interest some of you: Project silk can now be tested on desktop Firefox on Windows and OSX. Project silk aims to increase animation smoothness (smooth as silk) by synchronizing composition with VSync. To enable the new mode, go into about:config and set gfx.vsync.compositor, gfx.vsync.hw-vsync.enabled and gfx.vsync.refreshdriver to true (then restart the browser).

Note that this does not yet work on Linux, so don't try it lest you get stuck in a crash loop! Also, the implementation on Windows depends on the DWM (Windows' compositor) being available and enabled. The browser should still work just fine with it disabled, or on Windows XP where it isn't available, but it won't be synchronized with VSync.

Also: be careful with this if you're likely to switch to an older version of Nightly, since setting these preferences (which were first introduced for B2G) will probably cause older builds to crash. The VSync source for Windows has been available for about 2 or 3 days now.

For more information, see also the project wiki page and the meta bug's dependencies.

If someone wants to benchmark - http://www.vsynctester.com/

[winapp2]

This should interest some of you: Project silk can now be tested on desktop Firefox on Windows and OSX. Project silk aims to increase animation smoothness (smooth as silk) by synchronizing composition with VSync. To enable the new mode, go into about:config and set gfx.vsync.compositor, gfx.vsync.hw-vsync.enabled and gfx.vsync.refreshdriver to true (then restart the browser).

Note that this does not yet work on Linux, so don't try it lest you get stuck in a crash loop! Also, the implementation on Windows depends on the DWM (Windows' compositor) being available and enabled. The browser should still work just fine with it disabled, or on Windows XP where it isn't available, but it won't be synchronized with VSync.

Also: be careful with this if you're likely to switch to an older version of Nightly, since setting these preferences (which were first introduced for B2G) will probably cause older builds to crash. The VSync source for Windows has been available for about 2 or 3 days now.

For more information, see also the project wiki page and the meta bug's dependencies.

If someone wants to benchmark - http://www.vsynctester.com/

Only hits 130fps without these options changed, hits 144fps with them on though:)

[BenYeeHua]

Only hits 130fps without these options changed, hits 144fps with them on though:)

I think the ways to benchmark is see did it will showing 2 frame in the same v-sync or not, but ya, no matter I enable it or not, a GC will kill the frame.
http://www.vsynctester.com/manual.html

[itisomegakai]

This should interest some of you: Project silk can now be tested on desktop Firefox on Windows and OSX. Project silk aims to increase animation smoothness (smooth as silk) by synchronizing composition with VSync. To enable the new mode, go into about:config and set gfx.vsync.compositor, gfx.vsync.hw-vsync.enabled and gfx.vsync.refreshdriver to true (then restart the browser).

Note that this does not yet work on Linux, so don't try it lest you get stuck in a crash loop! Also, the implementation on Windows depends on the DWM (Windows' compositor) being available and enabled. The browser should still work just fine with it disabled, or on Windows XP where it isn't available, but it won't be synchronized with VSync.

Also: be careful with this if you're likely to switch to an older version of Nightly, since setting these preferences (which were first introduced for B2G) will probably cause older builds to crash. The VSync source for Windows has been available for about 2 or 3 days now.

For more information, see also the project wiki page and the meta bug's dependencies.

If someone wants to benchmark - http://www.vsynctester.com/

Only hits 130fps without these options changed, hits 144fps with them on though:)

Amazing but would like to see how it performs on older/Low end hardware like P4 or E-series APU(which are mainly used for web surfing/offices etc).
Or Celeron based CPU's used in most offices.

[Grantius]

This should interest some of you: Project silk can now be tested on desktop Firefox on Windows and OSX. Project silk aims to increase animation smoothness (smooth as silk) by synchronizing composition with VSync. To enable the new mode, go into about:config and set gfx.vsync.compositor, gfx.vsync.hw-vsync.enabled and gfx.vsync.refreshdriver to true (then restart the browser).

Note that this does not yet work on Linux, so don't try it lest you get stuck in a crash loop! Also, the implementation on Windows depends on the DWM (Windows' compositor) being available and enabled. The browser should still work just fine with it disabled, or on Windows XP where it isn't available, but it won't be synchronized with VSync.

Also: be careful with this if you're likely to switch to an older version of Nightly, since setting these preferences (which were first introduced for B2G) will probably cause older builds to crash. The VSync source for Windows has been available for about 2 or 3 days now.

For more information, see also the project wiki page and the meta bug's dependencies.

Thanks for this, works well. I assume that means it doesn't work for Android?

[avada]

Hmm... To me the upper graph is mostly red sometimes with a quite exteme ampliteude. especially when I alt+tab back to the page, in which case it's just vertical lines...

[Ver Greeneyes]

Thanks for this, works well. I assume that means it doesn't work for Android?

No idea, honestly. It might, since Firefox OS is based on the same kernel, and that's that platform they focused on first. But I wouldn't mess with it if it isn't turned on by default.

Hmm... To me the upper graph is mostly red sometimes with a quite exteme ampliteude. especially when I alt+tab back to the page, in which case it's just vertical lines...

Do you have a lot of tabs open? Large pauses probably indicate garbage or cycle collection. If your computer is very busy (say, running Folding@Home or a BOINC project) that will also cause frequent latency spikes. It's interesting that alt-tabbing makes it worse.