Run results for: flat vs concat test

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser: Chrome 122

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

flat

66K/s

concat

64K/s

View exact numbers

Test name	Executions per second
✓ flat	66,287 Ops/sec
concat	63,571 Ops/sec

Script Preparation code:

var arr = Array(1000).fill([0])

Tests:

concat
function flatten(arr) { return Array.prototype.concat.apply([], arr); } flatten(arr)
flat
arr.flat();