Math.pow vs. simple multiplication

JavaScript performance comparison

Revision 4 of this test case created by SourceR

Info

if you only need the square of something, what will eventually be faster?

Preparation code

<p>
  Hi there, this is math, only. No Output here
</p>
<script type="application/javascript;version=1.8">
  // JavaScript 1.8 is currently available only in Firefox
  function square18(x) x * x;
</script>
<script>
  var x1 = Math.random();

  function ownSquare(num) {
    return num * num;
  }
// fallback
if(!square18) var square18 = ownSquare;
</script>

Preparation code output

Hi there, this is math, only. No Output here

Test runner

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Testing in unknown unknown
Test Ops/sec
Simple Multiplication
e = x1 * x1;
pending…
Math.pow
e = Math.pow(x1, 2);
pending…
own Pow
e = ownSquare(x1);
pending…
Square from JS 1.8
e = square18(x1);
pending…

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Revisions

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