Run results for: Delete vs destructure for objects with and without mutating copy

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.2 Safari/605.1.15

Browser: Safari 26

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 6 months ago

delete directly

553.0M/s

delete - spread operator

63.5M/s

delete - assign

40.6M/s

Rest object

31.5M/s

delete - JSON.stringify

10.6M/s

View exact numbers

Script Preparation code:

var obj = {
  a:1,
  b:2,
  c:3
}

Tests:

delete - assign
const copy = Object.assign({}, obj); delete copy.a
Rest object
const { a, ...rest } = obj;
delete - spread operator
const copy = { ...obj } delete copy.a
delete - JSON.stringify
const copy = JSON.parse(JSON.stringify(obj)); delete copy.a
delete directly
delete obj.a