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bmeurer authored
By now only the default %TypedArray%.prototype.sort compare function and the JS implementation of SameValueZero were still using the odd %_IsMinusZero intrinsic, whose semantics both included a number check (actually HeapNumber test) plus testing if the heap number stores the special -0 value. In both cases we already know that we deal with number so we can reduce it to a simple number test for -0, which can be expressed via dividing 1 by that value and checking the sign of the result. In case of the compare function, we can be even smarter and work with the reciprocal values in case x and y are equal to 0 (although long term we should probably rewrite the fast case for the typed array sorting function in C++ anyway, which will be way, way faster than our handwritten callback-style, type-feedback polluted JS implementation). R=yangguo@chromium.org Review URL: https://codereview.chromium.org/1680783002 Cr-Commit-Position: refs/heads/master@{#33833}
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