Integer Conversion

JavaScript performance comparison

Revision 7 of this test case created by Johan Nordberg

Info

Compares different methods of integer conversion

Preparation code

<script>

function toIntMath(v) {
  if (v < 0) return Math.ceil(v);
  else return Math.floor(v);
};

function toIntBitwiseNot(v) {
  return ~~v;
};

function toIntBitwiseOr(v) {
  return v | 0;
};

</script>

Test runner

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Testing in unknown unknown
Test Ops/sec
parseInt
parseInt(50.5);
parseInt(-50.5);
pending…
Bitwise NOT
toIntBitwiseNot(50.5);
toIntBitwiseNot(-50.5);
pending…
Math functions
toIntMath(50.5);
toIntMath(-50.5);
pending…
Bitwise OR
toIntBitwiseOr(50.5);
toIntBitwiseOr(-50.5);
pending…

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Revisions

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