[Webkit-unassigned] [Bug 186731] New: RuleFeatureSet wastes 185KB of HashTable capacity on cnn.com

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=186731

            Bug ID: 186731
           Summary: RuleFeatureSet wastes 185KB of HashTable capacity on
                    cnn.com
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.fraser at apple.com

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&)

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20180616/676181ce/attachment-0001.html>