Changeset 150872 in webkit
- Timestamp:
- May 29, 2013 12:46:08 AM (11 years ago)
- Location:
- trunk/Source/WebCore
- Files:
-
- 2 edited
Legend:
- Unmodified
- Added
- Removed
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trunk/Source/WebCore/ChangeLog
r150871 r150872 1 2013-05-29 Ryosuke Niwa <rniwa@webkit.org> 2 3 Make WidgetHierarchyUpdatesSuspensionScope use swap instead of copy 4 https://bugs.webkit.org/show_bug.cgi?id=116927 5 6 Reviewed by Andreas Kling. 7 8 Merge https://chromium.googlesource.com/chromium/blink/+/1d577e1fd5c5716a06e4007e04fc3d9d0a88f5e4 9 10 This is equivalent behavior code that is unambiguously better performance. swap is O(1) time and memory, 11 copying a hash table is at least linear with the number of elements. 12 13 * rendering/RenderWidget.cpp: 14 (WebCore::WidgetHierarchyUpdatesSuspensionScope::moveWidgets): 15 1 16 2013-05-29 Andreas Kling <akling@apple.com> 2 17 -
trunk/Source/WebCore/rendering/RenderWidget.cpp
r148536 r150872 59 59 void WidgetHierarchyUpdatesSuspensionScope::moveWidgets() 60 60 { 61 WidgetToParentMap map = widgetNewParentMap();62 widgetNewParentMap(). clear();61 WidgetToParentMap map; 62 widgetNewParentMap().swap(map); 63 63 WidgetToParentMap::iterator end = map.end(); 64 64 for (WidgetToParentMap::iterator it = map.begin(); it != end; ++it) {
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