Info

Compares Math.floor(x) to (x >> 0) as a way of converting to an int. They aren't completely equivalent; note that Math.floor(NaN) is NaN, while (NaN >> 0) is 0. Also added a if NaN function.

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    function a(num) {return Math.floor(num);}
    function b(num) {return +num>>0;}
    function c(num) {num=+num;return num===num?num>>0:NaN;}
    function d(num) {if(+num===NaN)return NaN;return num>>0;}
    function e(num) {return Number(Number(num)>>0)}
    function f(num) {return Number(num)===num?num===""?0:num>>0:NaN;}
  };
</script>

Test runner

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a(10*Math.random())

b(10*Math.random())

c(10*Math.random())

d(10*Math.random())

e(10*Math.random())

f(10*Math.random())

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published by Ted Hopp on 2nd January 2013
• Revision 2: published on 27th January 2013

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