Math.round vs hack (v91)

Revision 91 of this benchmark created on

Preparation HTML

<script>
  var somenum = -500 + (Math.random() * 1000);
  var rounded;
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
"proper" rounding
rounded = Math.round(somenum);
ready
Hack rounding
rounded = ~~ (0.5 + somenum);
ready
Proper hack rounding
rounded = ~~ (somenum + (somenum > 0 ? .5 : -.5));
ready
bitwise or with 0
rounded = somenum | 0;
ready

Revisions

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