Run results for: Delete vs destructure for objects without mutating

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.124 Safari/537.36 Edg/102.0.1245.41

Browser: Chrome 102

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
delete - assign	1871399.1 Ops/sec
Rest object	2264445.5 Ops/sec
delete - spread operator	2268499.8 Ops/sec
delete - JSON.stringify	1602421.0 Ops/sec

Script Preparation code:

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

Tests:

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

Run results for: Delete vs destructure for objects without mutating

Measure the performance of delete versus removing a prop from an object without mutating

delete - assign

Rest object

delete - spread operator

delete - JSON.stringify