Run results for: Lodash Flatten v.s. concat

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Lodash Flatten	11907943.0 Ops/sec
concate	4639253.0 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

AخA
 
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

let ary = [1, [2, [3]]]

 
let ary = [1, [2, [3]]]

Tests:

Lodash Flatten
let ary = [1, [2, [3]]] return _.flatten(ary)
let ary = [1, [2, [3]]]
return _.flatten(ary)

let ary = [1, [2, [3]]]
let res = []
ary.forEach(item => {
  if(!Array.isArray(item)) res.push(i)
  else res = res.concat(i)
});
return res

 
let ary = [1, [2, [3]]]let res = []ary.forEach(item => {  if(!Array.isArray(item)) res.push(i)  else res = res.concat(i)});return res