bitwise vs or length conversion

JavaScript performance comparison

Test case created by John Cockrell

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var o = {one:'one', two:'two', three:'three'},
      a = [1,2,3],
      s = document.getElementsByTagName('script');
  
  function or(x) {
      return x && x.length || 0;
  }
  
  function bit(x){ 
     return x.length >>> 0;
  }

};
</script>

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
or
or(o);
or(a);
or(s);
pending…
bit
bit(o);
bit(a);
bit(s);
pending…

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