Benchmark: Delete vs destructure for objects with and without mutating copy

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

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
delete - assign
Rest object
delete - spread operator
delete - JSON.stringify
delete directly

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 6 months ago)

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/OS: Safari 26 on Mac OS X 10.15.7

View result in a separate tab

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

Test name	Executions per second
✓ delete directly	552,952,512 Ops/sec
delete - spread operator	63,493,456 Ops/sec
delete - assign	40,565,648 Ops/sec
Rest object	31,463,916 Ops/sec
delete - JSON.stringify	10,610,965 Ops/sec

Delete vs destructure for objects with and without mutating copy (version: 2)

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

Comparing performance of: `delete - assign vs Rest object vs delete - spread operator vs delete - JSON.stringify vs delete directly`

Created: one year ago by: Registered User

Go to the latest result

delete - assign

Rest object

delete - spread operator

delete - JSON.stringify

delete directly

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Delete vs destructure for objects with and without mutating copy (version: 2)

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

Comparing performance of: delete - assign vs Rest object vs delete - spread operator vs delete - JSON.stringify vs delete directly

Created: one year ago by: Registered User

Go to the latest result

delete - assign

Rest object

delete - spread operator

delete - JSON.stringify

delete directly

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `delete - assign vs Rest object vs delete - spread operator vs delete - JSON.stringify vs delete directly`