Math.floor vs Math.round vs parseInt vs Bitwise

JavaScript performance comparison

Revision 22 of this test case created

Info

Rounding in all form possible

Preparation code

<script>
var bitround = function(x) {
  return x | 0;
}
</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
bitround(89.938 / 293.3);
bitround(83784 / 9289.2);
bitround(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…

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Revisions

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