[Webkit-unassigned] [Bug 229680] REGRESSION (r272900): wpt.fyi loading performance is very slow (regressed, and slower than other browsers)

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon Aug 30 12:25:58 PDT 2021


https://bugs.webkit.org/show_bug.cgi?id=229680

--- Comment #1 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
Sample shows:

 +   !   1620 WebCore::Element::dispatchMouseEvent(WebCore::PlatformMouseEvent const&, WTF::AtomString const&, int, WebCore::Element*, WebCore::IsSyntheticClick)  (in WebCore) + 802  [0x10814d432]
 +   !     1620 WebCore::EventDispatcher::dispatchEvent(WebCore::Node&, WebCore::Event&)  (in WebCore) + 4771  [0x1081683a3]
 +   !       1620 WebCore::dispatchEventInDOM(WebCore::Event&, WebCore::EventPath const&)  (in WebCore) + 240  [0x108168e40]
 +   !         1620 WebCore::EventTarget::fireEventListeners(WebCore::Event&, WebCore::EventTarget::EventInvokePhase)  (in WebCore) + 611  [0x10816c3e3]
 +   !           1620 WebCore::EventTarget::innerInvokeEventListeners(WebCore::Event&, WTF::Vector<WTF::RefPtr<WebCore::RegisteredEventListener, WTF::RawPtrTraits<WebCore::RegisteredEventListener>, WTF::DefaultRefDerefTraits<WebCore::RegisteredEventListener> >, 1ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc>, WebCore::EventTarget::EventInvokePhase)  (in WebCore) + 428  [0x10816cb6c]
 +   !             1507 WebCore::JSEventListener::handleEvent(WebCore::ScriptExecutionContext&, WebCore::Event&)  (in WebCore) + 1965  [0x107e286ad]
 +   !             : 1507 WebCore::JSExecState::~JSExecState()  (in WebCore) + 214  [0x107e2c756]
 +   !             :   1507 WebCore::MicrotaskQueue::performMicrotaskCheckpoint()  (in WebCore) + 149  [0x108181d35]
 +   !             :     1507 WTF::Detail::CallableWrapper<WebCore::WindowEventLoop::queueMutationObserverCompoundMicrotask()::$_0, void>::call()  (in WebCore) + 71  [0x1081e6797]
 +   !             :       1507 WebCore::MutationObserver::notifyMutationObservers(WebCore::WindowEventLoop&)  (in WebCore) + 2255  [0x10818844f]
 +   !             :         1507 WebCore::JSMutationCallback::handleEvent(WebCore::MutationObserver&, WTF::Vector<WTF::Ref<WebCore::MutationRecord, WTF::RawPtrTraits<WebCore::MutationRecord> >, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&, WebCore::MutationObserver&)  (in WebCore) + 515  [0x10758deb3]
 +   !             :           1507 WebCore::JSCallbackData::invokeCallback(WebCore::JSDOMGlobalObject&, JSC::JSObject*, JSC::JSValue, JSC::MarkedArgumentBuffer&, WebCore::JSCallbackData::CallbackType, JSC::PropertyName, WTF::NakedPtr<JSC::Exception>&)  (in WebCore) + 611  [0x107e10b33]
 +   !             :             1507 JSC::profiledCall(JSC::JSGlobalObject*, JSC::ProfilingReason, JSC::JSValue, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&, WTF::NakedPtr<JSC::Exception>&)  (in JavaScriptCore) + 174  [0x10bb8bdce]
 +   !             :               1507 JSC::Interpreter::executeCall(JSC::JSGlobalObject*, JSC::JSObject*, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&)  (in JavaScriptCore) + 555  [0x10b92c81b]
 +   !             :                 1507 vmEntryToJavaScript  (in JavaScriptCore) + 216  [0x10b251326]
 +   !             :                   1501 ???  (in <unknown binary>)  [0x3a716bc303aa]
 +   !             :                   | 1501 ???  (in <unknown binary>)  [0x3a716ba2c317]
 +   !             :                   |   1499 ???  (in <unknown binary>)  [0x3a716be87fca]
 +   !             :                   |   + 1452 ???  (in <unknown binary>)  [0x3a716bc177d8]
 +   !             :                   |   + ! 1186 ???  (in <unknown binary>)  [0x3a716bdfa779]
 +   !             :                   |   + ! : 1186 ???  (in <unknown binary>)  [0x3a716ba011d8]
 +   !             :                   |   + ! :   1058 WebCore::jsNodePrototypeFunction_insertBefore(JSC::JSGlobalObject*, JSC::CallFrame*)  (in WebCore) + 392  [0x1075bb4a8]
 +   !             :                   |   + ! :   | 718 WebCore::ContainerNode::insertBefore(WebCore::Node&, WebCore::Node*)  (in WebCore) + 1697  [0x1080ea671]
 +   !             :                   |   + ! :   | + 718 WebCore::HTMLElement::childrenChanged(WebCore::ContainerNode::ChildChange const&)  (in WebCore) + 18  [0x10834fcb2]
 +   !             :                   |   + ! :   | +   697 WebCore::SlotAssignment::didChangeSlot(WTF::AtomString const&, WebCore::ShadowRoot&)  (in WebCore) + 260  [0x1081c9f24]
 +   !             :                   |   + ! :   | +   ! 364 WebCore::RenderTreeUpdater::tearDownRenderers(WebCore::Element&, WebCore::RenderTreeUpdater::TeardownType, WebCore::RenderTreeBuilder&)  (in WebCore) + 332  [0x108cd7f3c]
 +   !             :                   |   + ! :   | +   ! : 106 WebCore::ComposedTreeIterator::traverseNextInShadowTree()  (in WebCore) + 96  [0x1080e33a0]
 +   !             :                   |   + ! :   | +   ! : | 106 WebCore::ElementAndTextDescendantIterator::traverseNext()  (in WebCore) + 196,45,...  [0x1080e37b4,0x1080e371d,...]
 +   !             :                   |   + ! :   | +   ! : 67 WebCore::ComposedTreeIterator::traverseNextInShadowTree()  (in WebCore) + 192  [0x1080e3400]
 +   !             :                   |   + ! :   | +   ! : | 67 WebCore::HTMLSlotElement::assignedNodes() const  (in WebCore) + 64  [0x1083dd940]
 +   !             :                   |   + ! :   | +   ! : |   67 WebCore::SlotAssignment::assignedNodesForSlot(WebCore::HTMLSlotElement const&, WebCore::ShadowRoot&)  (in WebCore) + 353  [0x1081c6181]
 +   !             :                   |   + ! :   | +   ! : |     60 WebCore::SlotAssignment::assignSlots(WebCore::ShadowRoot&)  (in WebCore) + 258  [0x1081c9032]
 +   !             :                   |   + ! :   | +   ! : |     + 34 WebCore::SlotAssignment::assignToSlot(WebCore::Node&, WTF::AtomString const&)  (in WebCore) + 730,340,...  [0x1081ca63a,0x1081ca4b4,...]

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