Run results for: toFixed vs toPrecision vs Math.round() vs toLocaleString

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36

Browser: Chrome 105

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
toFixed(4)	6681971.0 Ops/sec
toPrecision(4).toString()	7118705.5 Ops/sec
(Math.round(*10000)/10000).toString()	6548461.0 Ops/sec
toLocaleString("en-gb", {minimumFractionDigits: 0, maximumFractionDigits: 4})	59803.9 Ops/sec

Script Preparation code:

var someFloat = 0.123456789;

Tests:

toFixed(4)
someFloat.toFixed(4);
toPrecision(4).toString()
someFloat.toPrecision(4).toString();
(Math.round(*10000)/10000).toString()
(Math.round(someFloat*10000)/10000).toString();
toLocaleString("en-gb", {minimumFractionDigits: 0, maximumFractionDigits: 4})
someFloat.toLocaleString("en-gb", {minimumFractionDigits: 0, maximumFractionDigits: 4})