Run results for: Floats: toFixed vs toPrecision vs Math.round - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36

Browser: Chrome 86

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
parseFloat() + toFixed(4)	1913604.0 Ops/sec
parseFloat() + toPrecision(4)	2293829.0 Ops/sec
Math.round(*10000)/10000	5259752.0 Ops/sec

Website performance monitoring

Script Preparation code:

var someFloat = 0.123456789;

Tests:

parseFloat() + toFixed(4)
parseFloat(someFloat.toFixed(4));
parseFloat() + toPrecision(4)
parseFloat(someFloat.toPrecision(4));
Math.round(*10000)/10000
Math.round(someFloat*10000)/10000;