[Webkit-unassigned] [Bug 186735] HTTPHeaderMap wastes 226KB of HashTable capacity on cnn.com

Sat Jun 16 12:31:16 PDT 2018

https://bugs.webkit.org/show_bug.cgi?id=186735

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|HTTPHeaderMap wastes 117KB  |HTTPHeaderMap wastes 226KB
                   |of HashTable capacity on    |of HashTable capacity on
                   |cnn.com                     |cnn.com

--- Comment #1 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
Also:

Wasted capacity: 109024 bytes (used 47264 of 156288 bytes, utilization: 30.24%) - 444 allocations
1   0x105db209d WTF::HashTable<WebCore::HTTPHeaderName, WTF::KeyValuePair<WebCore::HTTPHeaderName, WTF::String>, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::HTTPHeaderName, WTF::String> >, WTF::IntHash<WebCore::HTTPHeaderName>, WTF::HashMap<WebCore::HTTPHeaderName, WTF::String, WTF::IntHash<WebCore::HTTPHeaderName>, WTF::StrongEnumHashTraits<WebCore::HTTPHeaderName>, WTF::HashTraits<WTF::String> >::KeyValuePairTraits, WTF::StrongEnumHashTraits<WebCore::HTTPHeaderName> >::HashTable(WTF::HashTable<WebCore::HTTPHeaderName, WTF::KeyValuePair<WebCore::HTTPHeaderName, WTF::String>, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::HTTPHeaderName, WTF::String> >, WTF::IntHash<WebCore::HTTPHeaderName>, WTF::HashMap<WebCore::HTTPHeaderName, WTF::String, WTF::IntHash<WebCore::HTTPHeaderName>, WTF::StrongEnumHashTraits<WebCore::HTTPHeaderName>, WTF::HashTraits<WTF::String> >::KeyValuePairTraits, WTF::StrongEnumHashTraits<WebCore::HTTPHeaderName> > const&)
2   0x105db206d WTF::HashMap<WebCore::HTTPHeaderName, WTF::String, WTF::IntHash<WebCore::HTTPHeaderName>, WTF::StrongEnumHashTraits<WebCore::HTTPHeaderName>, WTF::HashTraits<WTF::String> >::HashMap(WTF::HashMap<WebCore::HTTPHeaderName, WTF::String, WTF::IntHash<WebCore::HTTPHeaderName>, WTF::StrongEnumHashTraits<WebCore::HTTPHeaderName>, WTF::HashTraits<WTF::String> > const&)
3   0x105db200d WTF::HashMap<WebCore::HTTPHeaderName, WTF::String, WTF::IntHash<WebCore::HTTPHeaderName>, WTF::StrongEnumHashTraits<WebCore::HTTPHeaderName>, WTF::HashTraits<WTF::String> >::HashMap(WTF::HashMap<WebCore::HTTPHeaderName, WTF::String, WTF::IntHash<WebCore::HTTPHeaderName>, WTF::StrongEnumHashTraits<WebCore::HTTPHeaderName>, WTF::HashTraits<WTF::String> > const&)
4   0x105db1faf WebCore::HTTPHeaderMap::HTTPHeaderMap(WebCore::HTTPHeaderMap const&)
5   0x105db1f1d WebCore::HTTPHeaderMap::HTTPHeaderMap(WebCore::HTTPHeaderMap const&)
6   0x106c75dc0 WebCore::ResourceResponseBase::ResourceResponseBase(WebCore::ResourceResponseBase const&)
7   0x106c75ca7 WebCore::ResourceResponse::ResourceResponse(WebCore::ResourceResponse const&)
8   0x106c6b4bd WebCore::ResourceResponse::ResourceResponse(WebCore::ResourceResponse const&)

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