Math.round vs (x + 0.5)|0

JavaScript performance comparison

Test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var x = 3.1,
        myRound = function(x) { return (x + 0.5)|0; }
};
</script>

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Testing in unknown unknown
Test Ops/sec
Math.round
Math.round(x);
pending…
(x + 0.5)|0
(x + 0.5)|0;
pending…
(x + 0.5)|0 in fn
myRound(x);
pending…

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