Run results for: lodash flatten vs reduce array

Run details:

User agent: Mozilla/5.0 (X11; CrOS x86_64 14588.98.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.59 Safari/537.36

Browser: Chrome 101

Operating system: Chrome OS 14588.98.0

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
flatten	20588.4 Ops/sec
reduce	1664.5 Ops/sec

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>

Script Preparation code:

myList = [];

for (let i = 0; i < 100; i++) {
  const arr = [];
  for (var n = 0; n < 100; n++) {
    arr.push({ ['key' + n]: n });
  }
  myList.push(arr)
}

Tests:

flatten
_.flatten(myList)
reduce
myList.reduce((acc, item) => { return [...acc, ...item]; }, [])