[Webkit-unassigned] [Bug 52820] REGRESSION(nightly build): My asteroids WebGL game pauses frequently beneath CALayerDisplayIfNeeded

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=52820


Geoffrey Garen <ggaren at apple.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|REGRESSION(nightly build):  |REGRESSION(nightly build):
                   |My asteroids WebGL game     |My asteroids WebGL game
                   |pauses frequently           |pauses frequently beneath
                   |                            |CALayerDisplayIfNeeded




--- Comment #2 from Geoffrey Garen <ggaren at apple.com>  2011-01-20 14:28:22 PST ---
I sample a nightly running this app. I saw a little GC activity in the sample, but this backtrace was 17X more prominent:


    7718 Thread_390378   DispatchQueue_1: com.apple.main-thread  (serial)
      6412 0x10000a1c0
        6412 NSApplicationMain
          6412 -[NSApplication run]
            6412 0x1000162f4
              6412 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:]
                6412 _DPSNextEvent
                  6412 BlockUntilNextEventMatchingListInMode
                    6412 ReceiveNextEventCommon
                      6412 RunCurrentEventLoopInMode
                        6412 CFRunLoopRunSpecific
                          6412 __CFRunLoopRun
                            5991 __CFRunLoopDoObservers
                              5956 CA::Transaction::commit()
                                5955 CA::Context::commit_transaction(CA::Transaction*)
                                  5954 CALayerDisplayIfNeeded
                                    5921 -[WebGLLayer display]
                                      5916 -[CAOpenGLLayer _display]
                                        5897 CAOpenGLLayerDraw(CAOpenGLLayer*, double, CVTimeStamp const*, unsigned int)
                                          5806 -[WebGLLayer drawInCGLContext:pixelFormat:forLayerTime:displayTime:]
                                            5777 glFinish_Exec
                                              5774 gldFinish
                                                5756 IOConnectCallMethod
                                                  5756 io_connect_method
                                                    5750 mach_msg
                                                      5750 mach_msg_trap

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