186731 2018-06-16 12:26:28 -0700 RuleFeatureSet wastes 185KB of HashTable capacity on cnn.com 2018-06-16 12:33:06 -0700 1 1 1 Unclassified WebKit CSS WebKit Nightly Build Unspecified Unspecified NEW InRadar P2 Normal --- 1 simon.fraser webkit-unassigned koivisto simon.fraser webkit-bug-importer oldest_to_newest 1433778 0 simon.fraser 2018-06-16 12:26:28 -0700 Using tooling from bug 186698, loading can and running "notifyutil -p com.apple.WebKit.dumpHashTableCapacity" shows: Wasted capacity: 185536 bytes (used 91968 of 277504 bytes, utilization: 33.14%) - 145 allocations 1 0x1074e1d45 WTF::HashTable<WTF::AtomicString, WTF::KeyValuePair<WTF::AtomicString, std::__1::unique_ptr<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul>, std::__1::default_delete<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul> > > >, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WTF::AtomicString, std::__1::unique_ptr<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul>, std::__1::default_delete<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul> > > > >, WTF::AtomicStringHash, WTF::HashMap<WTF::AtomicString, std::__1::unique_ptr<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul>, std::__1::default_delete<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul> > >, WTF::AtomicStringHash, WTF::HashTraits<WTF::AtomicString>, WTF::HashTraits<std::__1::unique_ptr<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul>, std::__1::default_delete<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul> > > > >::KeyValuePairTraits, WTF::HashTraits<WTF::AtomicString> >::HashTable() 2 0x1074e1d25 WTF::HashMap<WTF::AtomicString, std::__1::unique_ptr<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul>, std::__1::default_delete<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul> > >, WTF::AtomicStringHash, WTF::HashTraits<WTF::AtomicString>, WTF::HashTraits<std::__1::unique_ptr<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul>, std::__1::default_delete<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul> > > > >::HashMap() 3 0x1074e1c95 WTF::HashMap<WTF::AtomicString, std::__1::unique_ptr<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul>, std::__1::default_delete<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul> > >, WTF::AtomicStringHash, WTF::HashTraits<WTF::AtomicString>, WTF::HashTraits<std::__1::unique_ptr<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul>, std::__1::default_delete<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul> > > > >::HashMap() 4 0x1074e1c13 WebCore::RuleFeatureSet::RuleFeatureSet() 5 0x1074ddaa5 WebCore::RuleFeatureSet::RuleFeatureSet() 6 0x1074dd54d WebCore::DocumentRuleSets::DocumentRuleSets(WebCore::StyleResolver&) 7 0x1074ddb0d WebCore::DocumentRuleSets::DocumentRuleSets(WebCore::StyleResolver&) 8 0x10754e60f WebCore::StyleResolver::StyleResolver(WebCore::Document&) 1433779 1 webkit-bug-importer 2018-06-16 12:26:50 -0700 <rdar://problem/41189113> 1433793 2 simon.fraser 2018-06-16 12:33:06 -0700 Also this code path: Wasted capacity: 97504 bytes (used 34848 of 132352 bytes, utilization: 26.33%) - 145 allocations 1 0x1074e1d45 WTF::HashTable<WTF::AtomicString, WTF::KeyValuePair<WTF::AtomicString, std::__1::unique_ptr<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul>, std::__1::default_delete<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul> > > >, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WTF::AtomicString, std::__1::unique_ptr<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul>, std::__1::default_delete<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul> > > > >, WTF::AtomicStringHash, WTF::HashMap<WTF::AtomicString, std::__1::unique_ptr<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul>, std::__1::default_delete<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul> > >, WTF::AtomicStringHash, WTF::HashTraits<WTF::AtomicString>, WTF::HashTraits<std::__1::unique_ptr<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul>, std::__1::default_delete<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul> > > > >::KeyValuePairTraits, WTF::HashTraits<WTF::AtomicString> >::HashTable() 2 0x1074e1d25 WTF::HashMap<WTF::AtomicString, std::__1::unique_ptr<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul>, std::__1::default_delete<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul> > >, WTF::AtomicStringHash, WTF::HashTraits<WTF::AtomicString>, WTF::HashTraits<std::__1::unique_ptr<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul>, std::__1::default_delete<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul> > > > >::HashMap() 3 0x1074e1c95 WTF::HashMap<WTF::AtomicString, std::__1::unique_ptr<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul>, std::__1::default_delete<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul> > >, WTF::AtomicStringHash, WTF::HashTraits<WTF::AtomicString>, WTF::HashTraits<std::__1::unique_ptr<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul>, std::__1::default_delete<WTF::Vector<WebCore::RuleFeature, 0ul, WTF::CrashOnOverflow, 16ul> > > > >::HashMap() 4 0x1074e1c13 WebCore::RuleFeatureSet::RuleFeatureSet() 5 0x1074ddaa5 WebCore::RuleFeatureSet::RuleFeatureSet() 6 0x10752a80b WebCore::RuleSet::RuleSet() 7 0x10752a855 WebCore::RuleSet::RuleSet() 8 0x1074deeb2 WebCore::DocumentRuleSets::resetAuthorStyle()