Run results for: toFixed vs toPrecision vs Math.round() vs Math.floorfast vs MDN round_to_precision

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:144.0) Gecko/20100101 Firefox/144.0

Browser: Firefox 144

Operating system: Linux

Device Platform: Desktop

Date tested: 7 months ago

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

787.5M/s

Math.floor fast

777.8M/s

precisition round

748.8M/s

toFixed(4)

13.4M/s

toPrecision(4).toString()

9.3M/s

View exact numbers

Test name	Executions per second
✓ (Math.round(*10000)/10000).toString()	787,530,688 Ops/sec
Math.floor fast	777,832,256 Ops/sec
precisition round	748,847,936 Ops/sec
toFixed(4)	13,354,571 Ops/sec
toPrecision(4).toString()	9,280,721 Ops/sec

Script Preparation code:

var someFloat = 0.123456789;
 var round_to_precision = function (x, precision) {
    var y = +x + (precision === undefined ? 0.5 : precision/2);
    return y - (y % (precision === undefined ? 1 : +precision));
};

Tests: