Info

Testing dynamic arrays vs fixed length arrays, inspiration from Alex Gaynor's talk: https://speakerdeck.com/alex/why-python-ruby-and-javascript-are-slow

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    function square(n) {
      var ret = [];
      for (var i=0; i<n; i++) {
        ret[i] = i*i;
      }
      return ret;
    }
    
    function square2(n) {
      var ret = new Array(n);
      for (var i=0; i<n; i++) {
        ret[i] = i*i;
      }
      return ret;
    }
    
    function square3(n) {
        var buffer = new ArrayBuffer(n*4);
        var int32View = new Uint32Array(buffer);
        for (var i=0; i<n; i++) {
            int32View[i] = i*i;
        }
        return int32View;
    }
  };
</script>

Test runner

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Java applet disabled.

square(100);

square2(100);

square3(100);

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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 quimcalpe on 1st March 2013 and last updated on 2nd March 2013
• Revision 3: published on 2nd March 2013

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