==null vs !!

JavaScript performance comparison

Test case created by ly tran

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var a = true, b = false, c = null, d = '', e = {}, f = []
};
</script>

Test runner

Warning! For accurate results, please disable Firebug before running the tests. (Why?)

Java applet disabled.

Testing in unknown unknown
Test Ops/sec
== null
a == null, b == null, c == null, d == null, e == null
pending…
!!
!!a, !!b, !!c, !!d, !!e
pending…

You can edit these tests or add even more tests to this page by appending /edit to the URL.

Compare results of other browsers

0 comments

Add a comment