Run results for: Reflect.deleteProperty vs delete

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 126

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

delete - 0 property

1.1M/s

delete - * property

690K/s

delete - 1 property

688K/s

Reflect.deleteProperty - 0 property

494K/s

Reflect.deleteProperty - * property

388K/s

Reflect.deleteProperty - 1 property

370K/s

View exact numbers

Test name	Executions per second
✓ delete - 0 property	1,127,291 Ops/sec
delete - * property	690,020 Ops/sec
delete - 1 property	688,093 Ops/sec
Reflect.deleteProperty - 0 property	493,749 Ops/sec
Reflect.deleteProperty - * property	387,529 Ops/sec
Reflect.deleteProperty - 1 property	369,591 Ops/sec

Script Preparation code:

var many = {}
for (let i = 0; i < 100000; i++) many[i] = i

Tests:

delete - 1 property
var obj = { a: 1 } delete obj.a
Reflect.deleteProperty - 1 property
var obj = { a: 1 } Reflect.deleteProperty(obj, 'a')
delete - * property
delete many[50000] many[50000] = 50000
Reflect.deleteProperty - * property
Reflect.deleteProperty(many, 50000) many[50000] = 50000
delete - 0 property
delete many['x']
Reflect.deleteProperty - 0 property
Reflect.deleteProperty(many, 'x')