JavaScript bitwise NOT vs Math.floor()

JavaScript performance comparison

Revision 29 of this test case created by

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var numbers = [];
  
  //generate amount random numbers
  for (var i = 0; i < 100000; i++) {
    numbers[numbers.length] = Math.floor(Math.random() * 100000) / 10000;
  }

};
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Math.floor()
var test;
for (var i = 0; i < 100000; i++) {
  test = Math.floor(numbers[i]);
}
pending…
bitwise NOT
var test;
for (var i = 0; i < 100000; i++) {
  test = ~~ (numbers[i]);
}
pending…
<<0
var test;
for (var i = 0; i < 100000; i++) {
  test = (numbers[i]) << 0;
}
pending…
| 0
var test;
for (var i = 0; i < 100000; i++) {
  test = numbers[i] | 0;
}
pending…
parseInt
var test;
for (var i = 0; i < 100000; i++) {
  test = parseInt(numbers[i]);
}
pending…
Math.floor
var test;
var floor = Math.floor;
for (var i = 0; i < 100000; i++) {
  test = floor(numbers[i]);
}
pending…
Math.floor
var test;
var f = Math.floor;
for (var i = 0; i < 100000; i++) {
  test = f(numbers[i]);
}
pending…

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Revisions

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