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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Reduce

26K/s

Filter/Map

25K/s

Map/Filter

22K/s

View exact numbers

Test name	Executions per second
✓ Reduce	25,918 Ops/sec
Filter/Map	25,025 Ops/sec
Map/Filter	21,942 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);