indexof vs substring vs lastindexof

JavaScript performance comparison

Revision 11 of this test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var str = "azertyuiopqsdfghjkmwxcvbnazertyuiopqsdfghjkmwxcvbnazertyuiopqsdfghjkmwxcvbnazertyuiopqsdfghjkmwxcvbn";
    var sub = "xazertyuiop";
};
</script>

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Testing in unknown unknown
Test Ops/sec
indexof
str.indexOf(sub) === 0;
pending…
substring
str.substring(0, sub.length) === sub.length;
pending…
lastindexof
str.lastIndexOf(sub, 0) === 0;
pending…

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