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oliver@apple.com authored
https://bugs.webkit.org/show_bug.cgi?id=20821 Reviewed by Cameron Zwarich. Implement a transition cache to improve the performance of new properties being added to objects. This is extremely beneficial in constructors and shows up as a 34% improvement on access-binary-trees in SunSpider (0.8% overall) git-svn-id: http://svn.webkit.org/repository/webkit/trunk@36401 268f45cc-cd09-0410-ab3c-d52691b4dbfc
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