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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.142 Safari/537.36

Browser: Chrome 75

Operating system: Mac OS X 10.14.0

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
toFixed(4)	2440270.0 Ops/sec
toPrecision(4).toString()	3358586.0 Ops/sec
(Math.round(*10000)/10000).toString()	4817723.0 Ops/sec
Math.floor fast	13235860.0 Ops/sec

Website performance monitoring

Script Preparation code:

var someFloat = 0.123456789;

Tests:

toFixed(4)
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;