Run results for: reduce vs filter 22

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36 Edg/131.0.0.0

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Filter

2K/s

Reduce

2K/s

View exact numbers

Test name	Executions per second
✓ Filter	2,016 Ops/sec
Reduce	1,651 Ops/sec

Script Preparation code:

var map = {};
for (let i = 0; i < 20000; i++) {
  map[`${i}`] = (i % 2) === 0;
}

Tests:

Reduce
Object.keys(map).reduce((arr, key) => { if (map[key]) { arr.push(key); } return arr; }, []);
Filter
Object.keys(map).filter((key) => map[key]);