Info

How much faster is a precompiled regex vs a non-precompiled regex?

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var preCompiledReplaceRegex = /test/g; 
    
    myHtml = "<span>This is a test</span><div>Of a regex</div><p>test</p><em>test</em>";
  };
</script>

Test runner

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myHtml.replace(preCompiledReplaceRegex, 'kittens');

myHtml.replace(/test/g, "kittens");

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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 Levi Hackwith on 29th January 2013
• Revision 2: published by Levi Hackwith on 31st January 2013

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