bitwise vs or length conversion

JavaScript performance comparison

Revision 3 of this test case created by John Cockrell

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var o = {one:'one', two:'two', three:'three'},
        a = [1,2,3],
        s = document.getElementsByTagName('script');
   
    function or(x) {
        return (x || 0) - 1;
    }
   
    function bit(x){
       return (x >>> 0) - 1;
    }
};
</script>

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Testing in unknown unknown
Test Ops/sec
or
or(5);
or(0);
 
pending…
bit
bit(5);
bit(0);
 
pending…

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