MeasureThat.net

Run results for: toFixed vs toPrecision vs Math.round() vs Math.floorfast

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Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.183 Safari/537.36
Chrome 86
Linux
Desktop
4 years ago
Test name Executions per second
toFixed(4) 3902831.8 Ops/sec
toPrecision(4).toString() 3945257.0 Ops/sec
(Math.round(*10000)/10000).toString() 4070625.5 Ops/sec
Math.floor fast 11710413.0 Ops/sec
Script Preparation code:
AخA
 
var someFloat = 0.123456789;
Tests:

  • toFixed(4)

     
    someFloat.toFixed(4);

  • toPrecision(4).toString()

     
    someFloat.toPrecision(4);

  • (Math.round(*10000)/10000).toString()

    ​x
     
    (Math.round(someFloat*10000)/10000);
    ​

  • Math.floor fast

     
    ~~(someFloat * 10000) / 10000;