Run results for: Array push vs Spread

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.79 Safari/537.36

Browser: Chrome 79

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
A: push	69114.8 Ops/sec
B: Spread	1023.5 Ops/sec

Script Preparation code:

var list = Array.from({ length: 1000 }).map((_, i) => `Item ${i + 1}`);

Tests:

A: push
var newList = []; list.forEach(item => newList.push(item));
B: Spread
var newList = []; list.forEach(item => newList = [ ...newList, item ]);