[Webkit-unassigned] [Bug 186738] New: SourceProviderCache wastes 295KB of HashTable capacity on nytimes.com

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=186738

            Bug ID: 186738
           Summary: SourceProviderCache wastes 295KB of HashTable capacity
                    on nytimes.com
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          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: 294864 bytes (used 145584 of 440448 bytes, utilization: 33.05%) - 770 allocations
1   0x1166ce2d5 WTF::HashTable<int, WTF::KeyValuePair<int, std::__1::unique_ptr<JSC::SourceProviderCacheItem, std::__1::default_delete<JSC::SourceProviderCacheItem> > >, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<int, std::__1::unique_ptr<JSC::SourceProviderCacheItem, std::__1::default_delete<JSC::SourceProviderCacheItem> > > >, WTF::IntHash<int>, WTF::HashMap<int, std::__1::unique_ptr<JSC::SourceProviderCacheItem, std::__1::default_delete<JSC::SourceProviderCacheItem> >, WTF::IntHash<int>, WTF::UnsignedWithZeroKeyHashTraits<int>, WTF::HashTraits<std::__1::unique_ptr<JSC::SourceProviderCacheItem, std::__1::default_delete<JSC::SourceProviderCacheItem> > > >::KeyValuePairTraits, WTF::UnsignedWithZeroKeyHashTraits<int> >::HashTable()
2   0x1166ce2b5 WTF::HashMap<int, std::__1::unique_ptr<JSC::SourceProviderCacheItem, std::__1::default_delete<JSC::SourceProviderCacheItem> >, WTF::IntHash<int>, WTF::UnsignedWithZeroKeyHashTraits<int>, WTF::HashTraits<std::__1::unique_ptr<JSC::SourceProviderCacheItem, std::__1::default_delete<JSC::SourceProviderCacheItem> > > >::HashMap()
3   0x1166ce295 WTF::HashMap<int, std::__1::unique_ptr<JSC::SourceProviderCacheItem, std::__1::default_delete<JSC::SourceProviderCacheItem> >, WTF::IntHash<int>, WTF::UnsignedWithZeroKeyHashTraits<int>, WTF::HashTraits<std::__1::unique_ptr<JSC::SourceProviderCacheItem, std::__1::default_delete<JSC::SourceProviderCacheItem> > > >::HashMap()
4   0x1166ce24f JSC::SourceProviderCache::SourceProviderCache()
5   0x1166c6755 JSC::SourceProviderCache::SourceProviderCache()
6   0x1166c6615 JSC::VM::addSourceProviderCache(JSC::SourceProvider*)
7   0x116293338 JSC::Parser<JSC::Lexer<unsigned char> >::Parser(JSC::VM*, JSC::SourceCode const&, JSC::JSParserBuiltinMode, JSC::JSParserStrictMode, JSC::JSParserScriptMode, JSC::SourceParseMode, JSC::SuperBinding, JSC::ConstructorKind, JSC::DerivedContextType, bool, JSC::EvalContextType, JSC::DebuggerParseData*)
8   0x116293d71 JSC::Parser<JSC::Lexer<unsigned char> >::Parser(JSC::VM*, JSC::SourceCode const&, JSC::JSParserBuiltinMode, JSC::JSParserStrictMode, JSC::JSParserScriptMode, JSC::SourceParseMode, JSC::SuperBinding, JSC::ConstructorKind, JSC::DerivedContextType, bool, JSC::EvalContextType, JSC::DebuggerParseData*)

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