Run results for: toFixed vs mathjs round

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser: Chrome 134

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

round2

55.3M/s

toFixed

15.3M/s

mathjs.round

1.0M/s

View exact numbers

Test name	Executions per second
✓ round2	55,342,768 Ops/sec
toFixed	15,348,779 Ops/sec
mathjs.round	1,021,792 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/mathjs/10.0.0/math.min.js'></script>

Script Preparation code:

var num = -6.864601706668172e-10

function round2(num, decimalPlaces = 0) {
    // return Math.round(value * (10 ** decimals)) / (10 ** decimals);
    // return Number(value.toFixed(decimals));
    if (num < 0) {
        return -round2(-num, decimalPlaces);
    }
    var p = Math.pow(10, decimalPlaces);
    var n = num * p;
    var f = n - Math.floor(n);
    var e = Number.EPSILON * n;

    // Determine whether this fraction is a midpoint value.
    return (f >= .5 - e) ? Math.ceil(n) / p : Math.floor(n) / p;
}

Tests:

toFixed
parseFloat(num.toFixed(8))
mathjs.round
math.round(num, 8)
round2
round2(num, 8)