decimal rounding toFixed vs Math.round (v46)

Revision 46 of this benchmark created by Stephen Irving on

Setup

var number = Math.random() * 100;

Test runner

Ready to run.

Testing in
TestOps/sec
Fix to One Place - Custom (ES5)
var fixToOne = function (num) {
  return (num = Math.round(num * 10) / 10) + (num === (num|0) ? '.0' : '');
};
fixToOne(number);
ready
Fix to One Place - toFixed(1)
number.toFixed(1);
ready
Fix to One Place - Custom
const fixToOne = num =>
  (num = Math.round(num * 10) / 10) + (num === (num|0) ? '.0' : '');
fixToOne(number);
ready
Fix to Two Places - Custom
const fixToTwo = num => (num = (Math.round(num * 100) / 100) +
  (num === (num|0) ? '.0' : 0)) + (num === (num|0) ? '.0' : '') +
  (num * 10 === ((num * 10)|0) ? '0' : '');
fixToTwo(number);
ready
Fixed to Two Places - toFixed(2)
number.toFixed(2);
ready
Fixed to Two Places - Custom (ES5)
var fixToTwo = function (num) {
  return (num = (Math.round(num * 100) / 100) +
    (num === (num|0) ? '.0' : 0)) + (num === (num|0) ? '.0' : '') +
    (num * 10 === ((num * 10)|0) ? '0' : '');
};
fixToTwo(number);
ready

Revisions

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

  • Revision 1: published on
  • Revision 2: published on
  • Revision 3: published on
  • Revision 4: published on
  • Revision 5: published on
  • Revision 6: published on
  • Revision 7: published on
  • Revision 8: published on
  • Revision 9: published by Julian Diaz on
  • Revision 10: published on
  • Revision 16: published on
  • Revision 23: published by TJKoury on
  • Revision 27: published by Yanislav Igonin on
  • Revision 31: published by Stephen Irving on
  • Revision 32: published by Stephen Irving on
  • Revision 34: published by Stephen Irving on
  • Revision 45: published by Stephen Irving on
  • Revision 46: published by Stephen Irving on
  • Revision 50: published by Gust van de Wal on
  • Revision 51: published by Kesavamoorthi Subramanian on
  • Revision 52: published by Kesavamoorthi Subramanian on
  • Revision 53: published by Kesavamoorthi Subramanian on
  • Revision 54: published by Kesavamoorthi Subramanian on
  • Revision 55: published by Kesavamoorthi Subramanian on