Info

Test _.uniq optimizations proposed by Underscore issue 837 against recent Lo-Dash _.uniq optimizations for large arrays.

Preparation code

<script src="//dl.dropbox.com/u/513327/jsconf/2012/mod/lodash.uniq.min.js"></script>
<script>
var lodash = _.noConflict();
</script>
<script src="//dl.dropbox.com/u/513327/jsconf/2012/mod/underscore.charliesome.js"></script>
<script>
var modded = _.noConflict();
</script>
<script src="//cdnjs.cloudflare.com/ajax/libs/underscore.js/1.4.2/underscore-min.js"></script>
<script>
(function(window) {
  var array = Array(5e3);
  for (var index = 0; index < 5e3; index++) {
    array[index] = index + '';
  }
  window.array20 = (window.array20 = array.slice(0,10)).concat(array20);
  window.array5k = (window.array5k = array.slice(0, 2500)).concat(array5k);
  window.array10k = array.concat(array);
  window.array20k = array.concat(array, array, array);
}(this));
</script>
<script>
  Benchmark.prototype.setup = function() {
    var _ = window._,
        lodash = window.lodash,
        modded = window.modded;
    
    var array20  = window.array20,
        array5k  = window.array5k,
        array10k = window.array10k,
        array20k = window.array20k;
  };
</script>

Preparation code output

Test runner

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lodash.uniq(array20k);

modded.uniq(array20k);

_.uniq(array20k);

lodash.uniq(array10k);

modded.uniq(array10k);

_.uniq(array10k);

lodash.uniq(array5k);

modded.uniq(array5k);

_.uniq(array5k);

lodash.uniq(array20);

modded.uniq(array20);

_.uniq(array20);

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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 on 1st November 2012 and last updated on 3rd November 2012
• Revision 2: published by pm on 15th January 2013

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