Math.floor vs Math.round vs parseInt vs Bitwise vs Tilde

JavaScript performance comparison

Revision 32 of this test case created

Info

Rounding in all form possible

Preparation code

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

Test runner

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Testing in unknown unknown
Test Ops/sec
Math.floor
Math.floor(89.938 / 293.3);
Math.floor(83784 / 9289.2);
Math.floor(7 / 60);
pending…
Math.round
Math.round(89.938 / 293.3);
Math.round(83784 / 9289.2);
Math.round(7 / 60);
pending…
parseInt
parseInt(89.938 / 293.3, 10);
parseInt(83784 / 9289.2, 10);
parseInt(7 / 60, 10);
pending…
Bitwise |
89.938 / 293.3 | 0;
83784 / 9289.2 | 0;
7 / 60 | 0;
pending…
Bitwise
89.938 / 293.3 >> 0;
83784 / 9289.2 >> 0;
7 / 60 >> 0;
pending…
Tilde
~~(89.938 / 293.3);
~~(83784 / 9289.2);
~~(7 / 60);
pending…
Fast round
round(89.938 / 293.3);
round(83784 / 9289.2);
round(7 / 60);
pending…

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Revisions

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