Run results for: Reflect.deleteProperty vs delete

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:124.0) Gecko/20100101 Firefox/124.0

Browser: Firefox 124

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 2 years ago

delete - 0 property

86.3M/s

Reflect.deleteProperty - 0 property

56.4M/s

delete - * property

46.6M/s

Reflect.deleteProperty - * property

45.7M/s

delete - 1 property

30.2M/s

Reflect.deleteProperty - 1 property

24.1M/s

View exact numbers

Test name	Executions per second
✓ delete - 0 property	86,259,088 Ops/sec
Reflect.deleteProperty - 0 property	56,400,400 Ops/sec
delete - * property	46,646,416 Ops/sec
Reflect.deleteProperty - * property	45,743,460 Ops/sec
delete - 1 property	30,247,960 Ops/sec
Reflect.deleteProperty - 1 property	24,138,600 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')