Run results for: For loop, length, spread set vs For of

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:120.0) Gecko/20100101 Firefox/120.0

Browser: Firefox 120

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

For of

300/s

Const length

286/s

For loop

264/s

View exact numbers

Script Preparation code:

var set = new Set(Array.from(Array(1000).keys())
.map((x) => `item--${x}`))

Tests:

For of
for (var val of set) { console.log(val); }
Const length
const arr = [...set] let length = arr.length for (let i = 0; i < length; i++) { console.log(arr[i]) }
For loop
const arr = [...set] for (let i = 0; i < arr.length; i++) { console.log(arr[i]) }