Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36
Chrome 87
Mac OS X 10.14.6
Desktop
3 years ago
Test name Executions per second
toFixed(4) someFloat.toFixed(4); someFloat.t 3308609.0 Ops/sec
toPrecision(4).toString() 4489364.5 Ops/sec
(Math.round(*10000)/10000).toString() 5894485.0 Ops/sec
Math.floor fast 17930676.0 Ops/sec
Math.trunc 5914814.0 Ops/sec
Script Preparation code:
AخA
 
var someFloat = 0.123456789;
Tests:
  • toFixed(4) someFloat.toFixed(4); someFloat.t

     
    someFloat.toFixed(4);
  • toPrecision(4).toString()

     
    someFloat.toPrecision(4);
  • (Math.round(*10000)/10000).toString()

     
    (Math.round(someFloat*10000)/10000);
  • Math.floor fast

     
    ~~(someFloat * 10000) / 10000;
  • Math.trunc

     
    Math.trunc(someFloat * 10000) / 10000;