[Webkit-unassigned] [Bug 267054] Running the WebView with unlimited FPS results in perceived lagginess (though FPS are high), until it freezes and then runs smoothly afterwards

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=267054

Kimmo Kinnunen <kkinnunen at apple.com> changed:

           What    |Removed                     |Added
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         Depends on|                            |259756

--- Comment #2 from Kimmo Kinnunen <kkinnunen at apple.com> ---
Thank you for the report.

The iOS app would not show 4000 individual frames per second, only 60 or 120 of those. Rest of the work is discarded. As such, it's not really a high priority to investigate the issue. You could help us prioritize by mentioning what is the usecase for 4000 FPS.

If the use-case is recording the game run to a video as quickly as possible and then playing back the video 60 fps or such, maybe you could explain the capture mechanism and the mechanism  used to speed up the rendering. 

If you can export a web browser compatible version of the test case that would reproduce some part of the slowdown, that would be useful.


Likely related to bug 259756, where the slowdown would be explained by the unmapping of many destroyed iosurfaces.


Referenced Bugs:

https://bugs.webkit.org/show_bug.cgi?id=259756
[Bug 259756] GPUP WebGL in MiniBrowser still continuously allocates IOSurfaces
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