Run results for: Delete vs destructure for objects without mutating

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:139.0) Gecko/20100101 Firefox/139.0

Browser: Firefox 139

Operating system: Ubuntu

Device Platform: Desktop

Date tested: one year ago

Rest object

11.5M/s

delete - spread operator

10.9M/s

delete - assign

9.7M/s

delete - JSON.stringify

1.9M/s

View exact numbers

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