Info

You've heard the rumors - now here's the proof.

v3 adds pre-allocation

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var size = 2000;
  };
</script>

Test runner

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var arrayA = [];
for (var i = 0; i < size; i++) {
  arrayA[i] = 'foo';
}

var arrayB = [];
for (var i = 0; i < size; i++) {
  arrayB.push('foo');
}

var arrayC = new Array(size);
for (var i = 0; i < size; i++) {
  arrayC[i] = 'foo';
}

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published by Rick Waldron on 17th September 2010 and last updated on 9th December 2012
• Revision 2: published by mrgnou on 9th December 2012
• Revision 3: published on 22nd December 2012
• Revision 4: published by Timo on 14th February 2013
• Revision 5: published by Nige White on 21st February 2013

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