Info

Is it faster to remove an item from an array (and thus allow the indices to be renumbered) or delete a property from an object. Also, checking deletion from array, but this does not renumber the indices so may not be preferable.

Preparation code

<script>
  var someArr, someObj;
</script>
<script>
  Benchmark.prototype.setup = function() {
    someArr = [4, 5, 6];
    someObj = {a: 4, b: 5, c: 6};
  };
</script>

Test runner

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someArr.splice(1, 1);

delete someObj.b;

delete someArr[1];

delete someObj['b'];

someArr.splice(someArr.indexOf(5), 1);

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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 3rd April 2011
• Revision 2: published on 20th June 2012
• Revision 3: published by Quentin Brooks on 18th November 2012
• Revision 4: published on 17th February 2013
• Revision 5: published on 20th February 2013
• Revision 6: published by Reuven on 6th March 2013

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