Info

Check performance of === vs == in varying situations.

Preparation code

<script>
  var e = '',
      z = '',
      isUNL = function (v) { return typeof v !== 'undefined' && v !== null && e.length !== 0; };
</script>

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if (e === '') {
  z = '';
}

if (e == '') {
  z = '';
}

if (e.length === 0) {
  z = '';
}

if (e.length == 0) {
  z = '';
}

if (e.length) {
  z = '';
}

if (isUNL(e)) {
  z = '';
}

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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 June 2011
• Revision 2: published on 3rd June 2011
• Revision 3: published by Mike McCaughan on 6th July 2011
• Revision 4: published by Mike McCaughan on 13th October 2011
• Revision 5: published by Mike McCaughan on 13th October 2011
• Revision 6: published by Mike McCaughan on 13th October 2011
• Revision 7: published by Mike McCaughan on 6th December 2011
• Revision 8: published on 22nd March 2013

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