Math.floor vs Math.round vs parseInt vs Bitwise

JavaScript performance comparison

Revision 80 of this test case created

Info

Rounding in all form possible

Preparation code

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

Test runner

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Testing in unknown unknown
Test Ops/sec
Math.floor
floor(89.938 / 293.3);
floor(83784 / 9289.2);
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);
parseInt(83784 / 9289.2);
parseInt(7 / 60);
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…
Bitwise ~~
~~(89.938 / 293.3);
~~(83784 / 9289.2);
~~(7 / 60);
pending…
Bitwise <<
89.938 / 293.3 << 0;
83784 / 9289.2 << 0;
7 / 60 << 0;
pending…

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