Run results for: Reflect.deleteProperty vs delete

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Browser: Chrome 127

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

delete - 0 property

18.3M/s

delete - 1 property

13.0M/s

delete - * property

10.2M/s

Reflect.deleteProperty - 0 property

8.0M/s

Reflect.deleteProperty - 1 property

6.8M/s

Reflect.deleteProperty - * property

6.0M/s

View exact numbers

Test name	Executions per second
✓ delete - 0 property	18,334,606 Ops/sec
delete - 1 property	13,006,694 Ops/sec
delete - * property	10,240,112 Ops/sec
Reflect.deleteProperty - 0 property	7,997,178 Ops/sec
Reflect.deleteProperty - 1 property	6,833,484 Ops/sec
Reflect.deleteProperty - * property	6,044,912 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')