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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [GTK] RequestAnimationFrame ticks at 66 FPS instead of 60 FPS"
href="https://bugs.webkit.org/show_bug.cgi?id=166057#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [GTK] RequestAnimationFrame ticks at 66 FPS instead of 60 FPS"
href="https://bugs.webkit.org/show_bug.cgi?id=166057">bug 166057</a>
from <span class="vcard"><a class="email" href="mailto:clopez@igalia.com" title="Carlos Alberto Lopez Perez <clopez@igalia.com>"> <span class="fn">Carlos Alberto Lopez Perez</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=166057#c2">comment #2</a>)
<span class="quote">> 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.</span >
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.</pre>
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