Run results for: toFixed vs toPrecision vs Math.round() vs Math.floorfast vs new Math.trunc

Comparing performance of: toFixed(4) vs toPrecision(4).toString() vs (Math.round(*10000)/10000).toString() vs Math.floor fast vs the new Math.trunc

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 14_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/92.0.4515.90 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 92

Operating system: iOS 14.7

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
toFixed(4) someFloat.toFixed(4); someFloat.t	4859048.5 Ops/sec
toPrecision(4).toString()	4094205.0 Ops/sec
(Math.round(*10000)/10000).toString()	3241954.8 Ops/sec
Math.floor fast	9486683.0 Ops/sec
Math.trunc	3860789.8 Ops/sec

Script Preparation code:

var someFloat = 0.123456789;

Tests:

toFixed(4) someFloat.toFixed(4); someFloat.t
someFloat.toFixed(4);
toPrecision(4).toString()
someFloat.toPrecision(4);
(Math.round(*10000)/10000).toString()
(Math.round(someFloat*10000)/10000);
Math.floor fast
~~(someFloat * 10000) / 10000;
Math.trunc
Math.trunc(someFloat * 10000) / 10000;

Run results for: toFixed vs toPrecision vs Math.round() vs Math.floorfast vs new Math.trunc

Comparing performance of: toFixed(4) vs toPrecision(4).toString() vs (Math.round(*10000)/10000).toString() vs Math.floor fast vs the new Math.trunc

toFixed(4) someFloat.toFixed(4); someFloat.t

toPrecision(4).toString()

(Math.round(*10000)/10000).toString()

Math.floor fast

Math.trunc