regex vs charat

JavaScript performance comparison

Revision 2 of this test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var a = ".123456>>";
};
</script>

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Testing in unknown unknown
Test Ops/sec
regex
a.replace(/^\./, "")
pending…
charAt
if( a.charAt(0) === '.' ) {
   a = a.substr(1);
}
pending…
if( a.charAt(0) == '.' ) {
   a = a.substr(1);
}
pending…
if( a.charAt(0) === '.' ) a = a.substr(1);
pending…

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