Run results for: Filter and Map vs Reduce

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Browser: Chrome 130

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Filter and Map

130K/s

Reduce

11K/s

View exact numbers

Test name	Executions per second
✓ Filter and Map	130,104 Ops/sec
Reduce	10,763 Ops/sec

Script Preparation code:

var array = Array.from(Array(1000)).map((x, i) => ({ count: i, isOdd: Boolean(i % 2) }))

Tests:

Filter and Map
array.filter(x => x.isOdd).map(x => ({ stringCount: x.count.toString() }))
Reduce
array.reduce((acc, x) => x.isOdd ? [...acc, { stringCount: x.count.toString() }] : acc, [])