RESOLVED CONFIGURATION CHANGED 187237
STP 59: On united.com, WebContent process uses 100% CPU in WebAnimation code 
https://bugs.webkit.org/show_bug.cgi?id=187237
Summary STP 59: On united.com, WebContent process uses 100% CPU in WebAnimation code
Ryosuke Niwa
Reported 2018-07-01 14:11:58 PDT
Created attachment 344060 [details] sample The search result page on united.com (e.g. I looked for a business flight from SFO to Lyon, France from 10/22 to 10/28) causes WebContent process to use 100% CPU as long as the page is visible. Call graph: 1139 Thread_173677 DispatchQueue_1: com.apple.main-thread (serial) + 1138 start (in libdyld.dylib) + 1 [0x7fff68394015] + ! 1138 ??? (in com.apple.WebKit.WebContent) load address 0x1074d1000 + 0x16a1 [0x1074d26a1] + ! 1138 xpc_main (in libxpc.dylib) + 433 [0x7fff686eda1a] + ! 1138 _xpc_objc_main (in libxpc.dylib) + 580 [0x7fff686eedc7] + ! 1138 NSApplicationMain (in AppKit) + 804 [0x7fff3da3fa72] + ! 1138 -[NSApplication run] (in AppKit) + 764 [0x7fff3da70885] + ! 1138 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (in AppKit) + 3044 [0x7fff3e211e34] + ! 1138 _DPSNextEvent (in AppKit) + 2085 [0x7fff3da7ba73] + ! 1138 _BlockUntilNextEventMatchingListInModeWithFilter (in HIToolbox) + 64 [0x7fff3f7c9884] + ! 1138 ReceiveNextEventCommon (in HIToolbox) + 613 [0x7fff3f7c9b06] + ! 1138 RunCurrentEventLoopInMode (in HIToolbox) + 286 [0x7fff3f7c9d96] + ! 1137 CFRunLoopRunSpecific (in CoreFoundation) + 487 [0x7fff404eda07] + ! : 765 __CFRunLoopRun (in CoreFoundation) + 2427 [0x7fff404ee61b] + ! : | 684 __CFRunLoopDoTimers (in CoreFoundation) + 346 [0x7fff404f6e7a] + ! : | + 496 __CFRunLoopDoTimer (in CoreFoundation) + 1108 [0x7fff404f7384] + ! : | + ! 496 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ (in CoreFoundation) + 20 [0x7fff404f7704] + ! : | + ! 482 WebCore::timerFired(__CFRunLoopTimer*, void*) (in WebCore) + 31 [0x1082347af] + ! : | + ! : 391 WebCore::ThreadTimers::sharedTimerFiredInternal() (in WebCore) + 176 [0x108234870] + ! : | + ! : | 300 WebCore::TaskDispatcher<WebCore::Timer>::sharedTimerFired() (in WebCore) + 346 [0x109331afa] + ! : | + ! : | + 280 WebCore::DocumentTimeline::performInvalidationTask() (in WebCore) + 70 [0x108cf4426] + ! : | + ! : | + ! 256 WebCore::DeclarativeAnimation::invalidateDOMEvents(WTF::Seconds) (in WebCore) + 71 [0x108cf0047] + ! : | + ! : | + ! : 163 WebCore::AnimationEffectReadOnly::currentIteration() const (in WebCore) + 28 [0x108ceadec] + ! : | + ! : | + ! : | 159 WebCore::AnimationEffectReadOnly::activeTime() const (in WebCore) + 25 [0x108ceaa59] + ! : | + ! : | + ! : | + 146 WebCore::AnimationEffectReadOnly::phase() const (in WebCore) + 207 [0x108cea8df] + ! : | + ! : | + ! : | + ! 138 WebCore::WebAnimation::currentTime() const (in WebCore) + 64 [0x108cfc020] + ! : | + ! : | + ! : | + ! : 127 WebCore::DocumentTimeline::currentTime() (in WebCore) + 231 [0x108cf4397] + ! : | + ! : | + ! : | + ! : | 121 WebCore::GenericTaskQueue<WebCore::Timer>::enqueueTask(WTF::Function<void ()>&&) (in WebCore) + 155 [0x1086a6b5b] + ! : | + ! : | + ! : | + ! : | + 107 WebCore::TimerBase::setNextFireTime(WTF::MonotonicTime) (in WebCore) + 224 [0x109348c40] + ! : | + ! : | + ! : | + ! : | + ! 41 CFRunLoopTimerSetNextFireDate (in CoreFoundation) + 537 [0x7fff405022c9]
Attachments
sample (291.78 KB, text/plain)
2018-07-01 14:11 PDT, Ryosuke Niwa 		no flags
Details
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Radar WebKit Bug Importer
Comment 1 2018-07-02 00:25:23 PDT
<rdar://problem/41712556>
Antoine Quint
Comment 2 2018-07-20 10:51:06 PDT
I'm not reproducing with STP 61 with the steps outlined. I'm on the results page where a variety of flights are listed and Activity Monitor is reporting a model 10% CPU. Ryosuke, can you try to reproduce with STP 61?
Ryosuke Niwa
Comment 3 2018-07-20 19:36:31 PDT
Yup, not reproducing anymore.
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