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/110.0.0.0 Whale/3.19.166.16 Safari/537.36

Browser: Chrome 110

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
concat	26689.0 Ops/sec
flat	3283.6 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();