Is integer

JavaScript performance comparison

Revision 2 of this test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    function assert(x) {
      if (!x) {
        throw Error();
      }
    }
   
    function parseint(x) {
      return (parseInt(x) == x);
    }
   
    function isnan(x) {
      return !isNaN(x);
    }
   
    function test(func) {
      assert(func(0));
      assert(func(1));
      assert(func('1'));
    }
};
</script>

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Testing in unknown unknown
Test Ops/sec
isNaN
test(isnan)
 
pending…
parseInt
test(parseint);
 
pending…

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