186734 2018-06-16 12:29:06 -0700 FunctionCodeBlock wastes 144KB of HashTable capacity on cnn.com 2019-01-28 21:11:19 -0800 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build Unspecified Unspecified NEW InRadar P2 Normal --- 1 simon.fraser webkit-unassigned keith_miller saam simon.fraser webkit-bug-importer ysuzuki oldest_to_newest 1433784 0 simon.fraser 2018-06-16 12:29:06 -0700 Using tooling from bug 186698, loading can and running "notifyutil -p com.apple.WebKit.dumpHashTableCapacity" shows: Wasted capacity: 143952 bytes (used 37488 of 181440 bytes, utilization: 20.66%) - 4780 allocations 1 0x115776625 WTF::HashTable<std::__1::tuple<JSC::Structure*, JSC::Instruction*>, WTF::KeyValuePair<std::__1::tuple<JSC::Structure*, JSC::Instruction*>, WTF::Bag<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint, WTF::DumbPtrTraits<WTF::Private::BagNode<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint> > > >, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<std::__1::tuple<JSC::Structure*, JSC::Instruction*>, WTF::Bag<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint, WTF::DumbPtrTraits<WTF::Private::BagNode<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint> > > > >, WTF::TupleHash<JSC::Structure*, JSC::Instruction*>, WTF::HashMap<std::__1::tuple<JSC::Structure*, JSC::Instruction*>, WTF::Bag<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint, WTF::DumbPtrTraits<WTF::Private::BagNode<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint> > >, WTF::TupleHash<JSC::Structure*, JSC::Instruction*>, WTF::HashTraits<std::__1::tuple<JSC::Structure*, JSC::Instruction*> >, WTF::HashTraits<WTF::Bag<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint, WTF::DumbPtrTraits<WTF::Private::BagNode<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint> > > > >::KeyValuePairTraits, WTF::HashTraits<std::__1::tuple<JSC::Structure*, JSC::Instruction*> > >::HashTable() 2 0x115776605 WTF::HashMap<std::__1::tuple<JSC::Structure*, JSC::Instruction*>, WTF::Bag<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint, WTF::DumbPtrTraits<WTF::Private::BagNode<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint> > >, WTF::TupleHash<JSC::Structure*, JSC::Instruction*>, WTF::HashTraits<std::__1::tuple<JSC::Structure*, JSC::Instruction*> >, WTF::HashTraits<WTF::Bag<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint, WTF::DumbPtrTraits<WTF::Private::BagNode<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint> > > > >::HashMap() 3 0x11574ef25 WTF::HashMap<std::__1::tuple<JSC::Structure*, JSC::Instruction*>, WTF::Bag<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint, WTF::DumbPtrTraits<WTF::Private::BagNode<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint> > >, WTF::TupleHash<JSC::Structure*, JSC::Instruction*>, WTF::HashTraits<std::__1::tuple<JSC::Structure*, JSC::Instruction*> >, WTF::HashTraits<WTF::Bag<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint, WTF::DumbPtrTraits<WTF::Private::BagNode<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint> > > > >::HashMap() 4 0x1157504a5 JSC::CodeBlock::CodeBlock(JSC::VM*, JSC::Structure*, JSC::ScriptExecutable*, JSC::UnlinkedCodeBlock*, JSC::JSScope*, WTF::RefPtr<JSC::SourceProvider, WTF::DumbPtrTraits<JSC::SourceProvider> >&&, unsigned int, unsigned int) 5 0x11666020b JSC::FunctionCodeBlock::FunctionCodeBlock(JSC::VM*, JSC::Structure*, JSC::FunctionExecutable*, JSC::UnlinkedFunctionCodeBlock*, JSC::JSScope*, WTF::RefPtr<JSC::SourceProvider, WTF::DumbPtrTraits<JSC::SourceProvider> >&&, unsigned int, unsigned int) 6 0x11665ffa2 JSC::FunctionCodeBlock::FunctionCodeBlock(JSC::VM*, JSC::Structure*, JSC::FunctionExecutable*, JSC::UnlinkedFunctionCodeBlock*, JSC::JSScope*, WTF::RefPtr<JSC::SourceProvider, WTF::DumbPtrTraits<JSC::SourceProvider> >&&, unsigned int, unsigned int) 7 0x116659b2e JSC::FunctionCodeBlock::create(JSC::VM*, JSC::FunctionExecutable*, JSC::UnlinkedFunctionCodeBlock*, JSC::JSScope*, WTF::RefPtr<JSC::SourceProvider, WTF::DumbPtrTraits<JSC::SourceProvider> >&&, unsigned int, unsigned int) 8 0x11665967b JSC::ScriptExecutable::newCodeBlockFor(JSC::CodeSpecializationKind, JSC::JSFunction*, JSC::JSScope*, JSC::JSObject*&) 1433785 1 webkit-bug-importer 2018-06-16 12:29:37 -0700 <rdar://problem/41189150> 1433798 2 simon.fraser 2018-06-16 12:37:38 -0700 > 300KB on nytimes.com: Wasted capacity: 301344 bytes (used 77088 of 378432 bytes, utilization: 20.37%) - 8369 allocations 1 0x115776625 WTF::HashTable<std::__1::tuple<JSC::Structure*, JSC::Instruction*>, WTF::KeyValuePair<std::__1::tuple<JSC::Structure*, JSC::Instruction*>, WTF::Bag<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint, WTF::DumbPtrTraits<WTF::Private::BagNode<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint> > > >, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<std::__1::tuple<JSC::Structure*, JSC::Instruction*>, WTF::Bag<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint, WTF::DumbPtrTraits<WTF::Private::BagNode<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint> > > > >, WTF::TupleHash<JSC::Structure*, JSC::Instruction*>, WTF::HashMap<std::__1::tuple<JSC::Structure*, JSC::Instruction*>, WTF::Bag<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint, WTF::DumbPtrTraits<WTF::Private::BagNode<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint> > >, WTF::TupleHash<JSC::Structure*, JSC::Instruction*>, WTF::HashTraits<std::__1::tuple<JSC::Structure*, JSC::Instruction*> >, WTF::HashTraits<WTF::Bag<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint, WTF::DumbPtrTraits<WTF::Private::BagNode<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint> > > > >::KeyValuePairTraits, WTF::HashTraits<std::__1::tuple<JSC::Structure*, JSC::Instruction*> > >::HashTable() 2 0x115776605 WTF::HashMap<std::__1::tuple<JSC::Structure*, JSC::Instruction*>, WTF::Bag<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint, WTF::DumbPtrTraits<WTF::Private::BagNode<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint> > >, WTF::TupleHash<JSC::Structure*, JSC::Instruction*>, WTF::HashTraits<std::__1::tuple<JSC::Structure*, JSC::Instruction*> >, WTF::HashTraits<WTF::Bag<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint, WTF::DumbPtrTraits<WTF::Private::BagNode<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint> > > > >::HashMap() 3 0x11574ef25 WTF::HashMap<std::__1::tuple<JSC::Structure*, JSC::Instruction*>, WTF::Bag<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint, WTF::DumbPtrTraits<WTF::Private::BagNode<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint> > >, WTF::TupleHash<JSC::Structure*, JSC::Instruction*>, WTF::HashTraits<std::__1::tuple<JSC::Structure*, JSC::Instruction*> >, WTF::HashTraits<WTF::Bag<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint, WTF::DumbPtrTraits<WTF::Private::BagNode<JSC::LLIntPrototypeLoadAdaptiveStructureWatchpoint> > > > >::HashMap() 4 0x1157504a5 JSC::CodeBlock::CodeBlock(JSC::VM*, JSC::Structure*, JSC::ScriptExecutable*, JSC::UnlinkedCodeBlock*, JSC::JSScope*, WTF::RefPtr<JSC::SourceProvider, WTF::DumbPtrTraits<JSC::SourceProvider> >&&, unsigned int, unsigned int) 5 0x11666020b JSC::FunctionCodeBlock::FunctionCodeBlock(JSC::VM*, JSC::Structure*, JSC::FunctionExecutable*, JSC::UnlinkedFunctionCodeBlock*, JSC::JSScope*, WTF::RefPtr<JSC::SourceProvider, WTF::DumbPtrTraits<JSC::SourceProvider> >&&, unsigned int, unsigned int) 6 0x11665ffa2 JSC::FunctionCodeBlock::FunctionCodeBlock(JSC::VM*, JSC::Structure*, JSC::FunctionExecutable*, JSC::UnlinkedFunctionCodeBlock*, JSC::JSScope*, WTF::RefPtr<JSC::SourceProvider, WTF::DumbPtrTraits<JSC::SourceProvider> >&&, unsigned int, unsigned int) 7 0x116659b2e JSC::FunctionCodeBlock::create(JSC::VM*, JSC::FunctionExecutable*, JSC::UnlinkedFunctionCodeBlock*, JSC::JSScope*, WTF::RefPtr<JSC::SourceProvider, WTF::DumbPtrTraits<JSC::SourceProvider> >&&, unsigned int, unsigned int) 8 0x11665967b JSC::ScriptExecutable::newCodeBlockFor(JSC::CodeSpecializationKind, JSC::JSFunction*, JSC::JSScope*, JSC::JSObject*&)