NEW133247
DisplayRefreshMonitorManager can only handle one kind of DisplayRefreshMonitor per PlatformDisplayID 
https://bugs.webkit.org/show_bug.cgi?id=133247
Summary DisplayRefreshMonitorManager can only handle one kind of DisplayRefreshMonito...
Tim Horton
Reported 2014-05-23 18:34:40 PDT
After bug 132794, we have different kinds of DisplayRefreshMonitors between e.g. UI-side compositing and traditional compositing. DisplayRefreshMonitorManager is a singleton and only handles one DisplayRefreshMonitor per PlatformDisplayID. Therefore, if you had e.g. a UI Side compositing view and a traditional compositing view on Mac, both sharing a display, and both views tried to use rAF (or whatever), one of them would lose and get the wrong kind of Monitor. This could lead to performance problems or other brokenness. However! This is currently not a supported configuration by any means so the problem is currently purely theoretical.
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