round vs alrernative

JavaScript performance comparison

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Test Ops/sec
Math.round
var a = 2.516;

return Math.round(a);
pending…
alternative
var a = 2.516;

return (a + 0.5) | 0;
pending…
alternative2
var a = 2.516;

return ( (a + 0.5) <<1) >>1;
pending…

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