Math.floor vs Math.round vs parseInt vs Bitwise

JavaScript performance comparison

Revision 37 of this test case created

Info

Rounding in all form possible

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var a;
};
</script>

Test runner

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Testing in unknown unknown
Test Ops/sec
Math.floor
a = Math.floor(89.938 / 293.3);
a = Math.floor(83784 / 9289.2);
a = Math.floor(7 / 60);
pending…
Math.round
a = Math.round(89.938 / 293.3);
a = Math.round(83784 / 9289.2);
a = Math.round(7 / 60);
pending…
parseInt
a = parseInt(89.938 / 293.3);
a = parseInt(83784 / 9289.2);
a = parseInt(7 / 60);
pending…
Bitwise |
a = 89.938 / 293.3 | 0;
a = 83784 / 9289.2 | 0;
a = 7 / 60 | 0;
pending…
Bitwise
a = 89.938 / 293.3 >> 0;
a = 83784 / 9289.2 >> 0;
a = 7 / 60 >> 0;
pending…

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