[Webkit-unassigned] [Bug 186740] New: CodeBlockSet wastes 190KB of HashTable capacity on nytimes.com

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=186740

            Bug ID: 186740
           Summary: CodeBlockSet wastes 190KB 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: 189656 bytes (used 72488 of 262144 bytes, utilization: 27.65%) - 1 allocations
1   0x116005465 WTF::HashTable<JSC::CodeBlock*, JSC::CodeBlock*, WTF::IdentityExtractor, WTF::PtrHash<JSC::CodeBlock*>, WTF::HashTraits<JSC::CodeBlock*>, WTF::HashTraits<JSC::CodeBlock*> >::HashTable()
2   0x116005445 WTF::HashSet<JSC::CodeBlock*, WTF::PtrHash<JSC::CodeBlock*>, WTF::HashTraits<JSC::CodeBlock*> >::HashSet()
3   0x116001de5 WTF::HashSet<JSC::CodeBlock*, WTF::PtrHash<JSC::CodeBlock*>, WTF::HashTraits<JSC::CodeBlock*> >::HashSet()
4   0x116001da9 JSC::CodeBlockSet::CodeBlockSet()
5   0x116001e05 JSC::CodeBlockSet::CodeBlockSet()
6   0x11600ff64 JSC::Heap::Heap(JSC::VM*, JSC::HeapType)
7   0x1160126b3 JSC::Heap::Heap(JSC::VM*, JSC::HeapType)
8   0x1166b8e72 JSC::VM::VM(JSC::VM::VMType, JSC::HeapType)

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