Info

Which works faster (is there a difference), using Boolean(), true/false, !!, or 1/0?

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var booleanTrue = Boolean(1);
    var booleanFalse = Boolean(0);
    var trueTrue = true;
    var falseFalse = false;
    var numTrue = 1;
    var numFalse = 0;
    var exTrue = !0;
    var exFalse = !1;
  };
</script>

Test runner

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Java applet disabled.

if ( booleanTrue ) {}
if ( booleanFalse ) {}

if ( exTrue ) {}
if ( exFalse ) {}

if ( trueTrue) {}
if ( falseFalse) {}

if ( numTrue) {}
if ( numFalse ) {}

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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 Kyle A. Matheny on 16th October 2012
• Revision 2: published on 1st March 2013
• Revision 7: published by Ian Nartowicz on 19th March 2013
• Revision 8: published by pkoretic on 21st March 2013
• Revision 9: published by Aaron Gloege on 3rd April 2013

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