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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:78.0) Gecko/20100101 Firefox/78.0

Browser: Firefox 78

Operating system: Mac OS X 10.11

Device Platform: Desktop

Date tested: 3 months ago

Test name	Executions per second
parseFloat() + toFixed(4)	2609361.0 Ops/sec
parseFloat() + toPrecision(4)	2686565.8 Ops/sec
Math.round(*10000)/10000	41705100.0 Ops/sec

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;