[Webkit-unassigned] [Bug 186733] ensurePropertyReplacementWatchpointSet wastes 308KB of HashTable capacity on cnn.com

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=186733

Simon Fraser (smfr) <simon.fraser at apple.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|ensurePropertyReplacementWa |ensurePropertyReplacementWa
                   |tchpointSet wastes 168KB of |tchpointSet wastes 308KB of
                   |HashTable capacity on       |HashTable capacity on
                   |cnn.com                     |cnn.com

--- Comment #2 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
Also this code path:

Wasted capacity: 140416 bytes (used 44928 of 185344 bytes, utilization: 24.24%) - 1018 allocations
1   0x116684e05 WTF::HashTable<int, WTF::KeyValuePair<int, WTF::RefPtr<JSC::WatchpointSet, WTF::DumbPtrTraits<JSC::WatchpointSet> > >, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<int, WTF::RefPtr<JSC::WatchpointSet, WTF::DumbPtrTraits<JSC::WatchpointSet> > > >, WTF::IntHash<int>, WTF::HashMap<int, WTF::RefPtr<JSC::WatchpointSet, WTF::DumbPtrTraits<JSC::WatchpointSet> >, WTF::IntHash<int>, WTF::UnsignedWithZeroKeyHashTraits<int>, WTF::HashTraits<WTF::RefPtr<JSC::WatchpointSet, WTF::DumbPtrTraits<JSC::WatchpointSet> > > >::KeyValuePairTraits, WTF::UnsignedWithZeroKeyHashTraits<int> >::HashTable()
2   0x116684de5 WTF::HashMap<int, WTF::RefPtr<JSC::WatchpointSet, WTF::DumbPtrTraits<JSC::WatchpointSet> >, WTF::IntHash<int>, WTF::UnsignedWithZeroKeyHashTraits<int>, WTF::HashTraits<WTF::RefPtr<JSC::WatchpointSet, WTF::DumbPtrTraits<JSC::WatchpointSet> > > >::HashMap()
3   0x116684dc5 WTF::HashMap<int, WTF::RefPtr<JSC::WatchpointSet, WTF::DumbPtrTraits<JSC::WatchpointSet> >, WTF::IntHash<int>, WTF::UnsignedWithZeroKeyHashTraits<int>, WTF::HashTraits<WTF::RefPtr<JSC::WatchpointSet, WTF::DumbPtrTraits<JSC::WatchpointSet> > > >::HashMap()
4   0x1166754f2 JSC::Structure::ensurePropertyReplacementWatchpointSet(JSC::VM&, int)
5   0x116675b58 JSC::Structure::didCachePropertyReplacement(JSC::VM&, int)
6   0x11626c20a llint_slow_path_put_by_id
7   0x11531710f llint_entry
8   0x11531b8d6 llint_entry

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