Run results for: Reflect.deleteProperty vs delete

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.6 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 16

Operating system: iOS 16.6

Device Platform: Mobile

Date tested: 3 months ago

Test name	Executions per second
delete - 1 property	19044686.0 Ops/sec
Reflect.deleteProperty - 1 property	18566842.0 Ops/sec
delete - * property	50792252.0 Ops/sec
Reflect.deleteProperty - * property	46117600.0 Ops/sec
delete - 0 property	65489452.0 Ops/sec
Reflect.deleteProperty - 0 property	57640464.0 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')