Updates:
Status: Accepted
Labels: Type-FeatureRequest Priority-Low
Comment #1 on issue 3696 by [email protected]: slow code for 'integer'
checks
https://code.google.com/p/v8/issues/detail?id=3696
You may have heard that Crankshaft is deprecated (meaning, we try not to
touch it any more); however TurboFan is still some time away from getting
to optimizations on this level.
It also seems fairly hard to do this in a way that's *not* a very specific
hack to detect just this one pattern.
Btw, ES6 introduces Number.isInteger(), which currently isn't implemented
very efficiently either, but could easily be extended with a fast path for
Smis.
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