Run results for: Testing speed with Reflect.deleteProperty and delete

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Reflect.deleteProperty	4654816.5 Ops/sec
object delete	5508000.0 Ops/sec

Script Preparation code:

var numbers = Array(10).fill(null).map((x, i) => ({[i]: `${i}- ${i}`, [i+1]: i+1 }));

Tests:

Reflect.deleteProperty
numbers.forEach((number, index)=> Reflect.deleteProperty(number, index))
object delete
numbers.forEach((number, index)=> delete number[index])