Run results for: For loop with spread set vs for of Set

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser: Chrome 119

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

for loop

294/s

for loop with const length

287/s

Foor loop

268/s

View exact numbers

Script Preparation code:

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

Tests:

Foor loop
for (var val of set) { console.log(val); }
for loop with 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]) }