Run results for: Push vs Map - add prop to object

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser: Chrome 134

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Join

10K/s

Push

1K/s

View exact numbers

Test name	Executions per second
✓ Join	10,432 Ops/sec
Push	1,079 Ops/sec

Script Preparation code:

var objs = Array.from(new Array(10000)).map(() => ({ name: 'string' }))
var result = []

Tests:

Push
for (let i = 0; i < objs.length; i++) { result.push({ ...objs[i], id: i }) }
Join
result = objs.map((a, i) => ({ ...a, id: i }))