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

Benchmark engine: Benchmark.js

object delete

5.5M/s

Reflect.deleteProperty

4.7M/s

View exact numbers

Test name	Executions per second
✓ object delete	5,508,000 Ops/sec
Reflect.deleteProperty	4,654,816 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])