Run results for: toFixed + parse vs toPrecision vs Math.round() vs Math.floorfast - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36

Browser: Chrome 110

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
toFixed(4) and parse	4356923.0 Ops/sec
toPrecision(4).toString()	6301973.5 Ops/sec
(Math.round(*10000)/10000).toString()	6687158.5 Ops/sec
Math.floor fast	18962240.0 Ops/sec

Script Preparation code:

var someFloat = 0.123456789;

Tests:

toFixed(4) and parse
+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;