Run results for: Reduce vs Filter/Map vs Map/Filter

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:132.0) Gecko/20100101 Firefox/132.0

Browser: Firefox 132

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Filter/Map

239K/s

Map/Filter

188K/s

Reduce

117K/s

View exact numbers

Test name	Executions per second
✓ Filter/Map	239,375 Ops/sec
Map/Filter	188,047 Ops/sec
Reduce	116,513 Ops/sec

Script Preparation code:

var a = [];
for (let i = 0; i < 1000; i++) {
    a.push(Number(i) / 1000);
}
var filtering = x => (x * 114514) % 1 > 0.5;
var mapping = x => x + 0.1919;
var reducing = (acc, x) => {
    const value = mapping(x);
    if (filtering(value)) {
        acc.push(value);
    }
    return acc;
}

Tests:

Reduce
a.reduce(reducing, []);
Filter/Map
a.filter(filtering).map(mapping);
Map/Filter
a.map(mapping).filter(filtering);