[Webkit-unassigned] [Bug 166057] [GTK] RequestAnimationFrame ticks at 66 FPS instead of 60 FPS

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=166057

--- Comment #3 from Carlos Alberto Lopez Perez <clopez at igalia.com> ---
(In reply to comment #2)
> I looked into using DisplayRefreshMonitor for the GTK port, specifically in
> the ThreadedCompositor. The problem is that when using GLX, there's no
> facility available that could send a notification about the vsync event from
> the UIProcess down to the WebProcess. With Wayland there's frame callbacks.

Some people suggest to use a separate thread doing glXSwapBuffers(); glFinish(); all the time after setting glXSwapIntervalEXT(1) (which should cause the glXSwapBuffers call to be synced with vsync) and then notify the main thread about the vsync events.

But I doubt this will be a good idea from a performance-related point of view.

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