Test to see if !!~ is faster than >-1

JavaScript performance comparison

Revision 2 of this test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    function contains1( str, substr ) {
            return !!~('' + str).indexOf(substr);
    }
   
    function contains2( str, substr ) {
            return ('' + str).indexOf(substr)>-1;
    }
   
    function contains3( str, substr ) {
            return ('' + str).indexOf(substr)+1;
    }
};
</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
!!~
contains1('abc','a');
contains1('abc','d');
pending…
>-1
contains2('abc','a');
contains2('abc','d');
pending…
+1
contains3('abc','a');
contains3('abc','d');
pending…

Compare results of other browsers

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:

0 comments

Add a comment