Run results for: Reflect.deleteProperty vs delete

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:137.0) Gecko/20100101 Firefox/137.0

Browser: Firefox 137

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
delete - 1 property	23327238.0 Ops/sec
Reflect.deleteProperty - 1 property	16669977.0 Ops/sec
delete - * property	24258724.0 Ops/sec
Reflect.deleteProperty - * property	23775418.0 Ops/sec
delete - 0 property	49289660.0 Ops/sec
Reflect.deleteProperty - 0 property	37568308.0 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')