Run results for: Reflect.deleteProperty vs delete

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:131.0) Gecko/20100101 Firefox/131.0

Browser: Firefox 131

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

delete - 0 property

127.0M/s

Reflect.deleteProperty - 0 property

84.2M/s

delete - * property

82.8M/s

Reflect.deleteProperty - * property

72.5M/s

delete - 1 property

48.1M/s

Reflect.deleteProperty - 1 property

37.5M/s

View exact numbers

Test name	Executions per second
✓ delete - 0 property	127,009,256 Ops/sec
Reflect.deleteProperty - 0 property	84,200,384 Ops/sec
delete - * property	82,751,496 Ops/sec
Reflect.deleteProperty - * property	72,456,032 Ops/sec
delete - 1 property	48,081,408 Ops/sec
Reflect.deleteProperty - 1 property	37,471,080 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')