Does an unused closure cost anything?

JavaScript performance comparison

Test case created by yvt

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  function assert(fn) {}
  
  var x = 1;

};
</script>

Test runner

Warning! For accurate results, please disable Firebug before running the tests. (Why?)

Java applet disabled.

Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Without assertions
x ^= x << 13; x ^= x << 17; x ^= x << 5;
x ^= x << 13; x ^= x << 17; x ^= x << 5;
x ^= x << 13; x ^= x << 17; x ^= x << 5;
x ^= x << 13; x ^= x << 17; x ^= x << 5;
x ^= x << 13; x ^= x << 17; x ^= x << 5;
pending…
With assertions
assert(() => x !== 0);
x ^= x << 13; x ^= x << 17; x ^= x << 5;
assert(() => x !== 0);
x ^= x << 13; x ^= x << 17; x ^= x << 5;
assert(() => x !== 0);
x ^= x << 13; x ^= x << 17; x ^= x << 5;
assert(() => x !== 0);
x ^= x << 13; x ^= x << 17; x ^= x << 5;
assert(() => x !== 0);
x ^= x << 13; x ^= x << 17; x ^= x << 5;
assert(() => x !== 0);
pending…

You can edit these tests or add even more tests to this page by appending /edit to the URL.

Compare results of other browsers

0 Comments