[Webkit-unassigned] [Bug 186741] New: FontCascadeFonts WidthCache wastes 170KB of HashTable capacity on nytimes.com

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=186741

            Bug ID: 186741
           Summary: FontCascadeFonts WidthCache wastes 170KB of HashTable
                    capacity on nytimes.com
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Text
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.fraser at apple.com
                CC: mmaxfield at apple.com

Using tooling from bug 186698, loading can and running "notifyutil -p com.apple.WebKit.dumpHashTableCapacity" shows:

Wasted capacity: 170920 bytes (used 85720 of 256640 bytes, utilization: 33.40%) - 137 allocations
1   0x10834b3c5 WTF::HashTable<WebCore::WidthCache::SmallStringKey, WTF::KeyValuePair<WebCore::WidthCache::SmallStringKey, float>, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::WidthCache::SmallStringKey, float> >, WebCore::WidthCache::SmallStringKeyHash, WTF::HashMap<WebCore::WidthCache::SmallStringKey, float, WebCore::WidthCache::SmallStringKeyHash, WebCore::WidthCache::SmallStringKeyHashTraits, WTF::HashTraits<float> >::KeyValuePairTraits, WebCore::WidthCache::SmallStringKeyHashTraits>::HashTable()
2   0x10834b3a5 WTF::HashMap<WebCore::WidthCache::SmallStringKey, float, WebCore::WidthCache::SmallStringKeyHash, WebCore::WidthCache::SmallStringKeyHashTraits, WTF::HashTraits<float> >::HashMap()
3   0x10834b225 WTF::HashMap<WebCore::WidthCache::SmallStringKey, float, WebCore::WidthCache::SmallStringKeyHash, WebCore::WidthCache::SmallStringKeyHashTraits, WTF::HashTraits<float> >::HashMap()
4   0x10834b1de WebCore::WidthCache::WidthCache()
5   0x10833b065 WebCore::WidthCache::WidthCache()
6   0x10833aee7 WebCore::FontCascadeFonts::FontCascadeFonts(WTF::RefPtr<WebCore::FontSelector, WTF::DumbPtrTraits<WebCore::FontSelector> >&&)
7   0x10833b0cd WebCore::FontCascadeFonts::FontCascadeFonts(WTF::RefPtr<WebCore::FontSelector, WTF::DumbPtrTraits<WebCore::FontSelector> >&&)
8   0x10834378f WebCore::FontCascadeFonts::create(WTF::RefPtr<WebCore::FontSelector, WTF::DumbPtrTraits<WebCore::FontSelector> >&&)

-- 
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/20180616/77bb961c/attachment.html>