Info

Test the performance difference between string concact and array join for a large (10,000) number of words.

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var words = ['this', 'is', 'a', 'test'];
    
    var text = words[0];
    
    var a = [words[0]];
    
    var i;
    
    var text2;
  };
</script>

Test runner

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for(i = 1; i < 10000; ++i)
{
    text += ' ' + words[i & 3] + Math.random();
}

text2 = text;
 

for(i = 1; i < 10000; ++i)
{
    a.push(' ',words[i & 3],Math.random());
}

text2 = a.join('');
 

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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 Jason on 22nd October 2012
• Revision 2: published by Kyle Simpson on 30th October 2012
• Revision 3: published by Kyle Simpson on 2nd November 2012
• Revision 4: published on 11th November 2012
• Revision 5: published by Rcdmk on 11th November 2012
• Revision 6: published by Schleuse on 21st February 2013
• Revision 7: published by Morten Sjoegren on 3rd April 2013
• Revision 8: published on 3rd April 2013
• Revision 9: published on 6th April 2013 and last updated 3 weeks ago
• Revision 10: published on 22nd April 2013
• Revision 11: published on 23rd April 2013

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