regex vs substring vs indexof

JavaScript performance comparison

Test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var str = 'iprefixavariable';
    var clientCode = 'jprefix';
    var clientCodeRegEx = new RegExp( '^' + clientCode);
};
</script>

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Testing in unknown unknown
Test Ops/sec
regex
clientCodeRegEx.test(str);
pending…
substring
str.substring(0, clientCode.length) == clientCode
pending…
indexof
str.indexOf(clientCode) === 0
pending…

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