Run results for: Number([num].toFixed(precision)) vs scaling + Math.round()

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser: Chrome 114

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
toFixed(4)	3923734.2 Ops/sec
Scale and round	5011247.0 Ops/sec

Script Preparation code:

var precision = 4;
var someFloat = 121251.123456789012;

Tests:

toFixed(4)
Number(someFloat.toFixed(precision));
Scale and round
var scale = 10 ** precision; Math.round(someFloat * scale) / scale;