Run results for: flatMap and forEach with push

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser: Chrome 119

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

forEach with push

17K/s

flatMap

1K/s

View exact numbers

Test name	Executions per second
✓ forEach with push	17,055 Ops/sec
flatMap	1,266 Ops/sec

Script Preparation code:

var arr = Array(10_000).fill(0)

Tests:

flatMap
var out = arr.flatMap(x => [x, x]);
forEach with push
var out = []; arr.forEach(x => { out.push(x); out.push(x); });