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A comment on WebKit sorts JS arrays using Selection Sort. Parent comment

Re:WebKit sorts JS arrays using Selection Sort by mda on Friday July 13, 2012 @09:56AM (#4239794)
No, Introsort is (Quicksort + Heapsort) designed to prevent algorithm to degenerate O(n^2) for particular input sets.

Afaik v8 (and Java's pre Java 7 versions) quicksort algorithms are based on Jon Bentley's work.

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