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

Comparing performance of: toFixed(4) vs toPrecision(4).toString() vs (Math.round(*10000)/10000).toString() vs Math.floor fast vs the new Math.trunc

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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.36
Chrome 101
Windows
Desktop
2 years ago
Test name Executions per second
toFixed(4) someFloat.toFixed(4); someFloat.t 4562779.5 Ops/sec
toPrecision(4).toString() 4715063.5 Ops/sec
(Math.round(*10000)/10000).toString() 4370554.5 Ops/sec
Math.floor fast 13465746.0 Ops/sec
Math.trunc 4362251.0 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;