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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.128 Safari/537.36

Browser: Chrome 89

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
parseFloat() + toFixed(4)	1404406.0 Ops/sec
parseFloat() + toPrecision(4)	1395712.0 Ops/sec
Math.round(*10000)/10000	2981399.0 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;