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Run results for:
for vs for ... of vs forEach vs map
Compare loop performance
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Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64; rv:147.0) Gecko/20100101 Firefox/147.0
Browser:
Firefox 147
Operating system:
Linux
Device Platform:
Desktop
Date tested:
2 months ago
Test name
Executions per second
for
2224217.8 Ops/sec
for ... of
998806.7 Ops/sec
forEach
1781016.0 Ops/sec
map
1731814.1 Ops/sec
Script Preparation code:
const array = Array.from({ length: 100 }, (_, i) => i) const result = []
Tests:
for
const result = [] for (let i = 0; i < array.length; i++) { result.push(array[i] * 2) }
for ... of
const result = [] for (const value of array) { result.push(value * 2) }
forEach
const result = [] array.forEach((value) => { result.push(value * 2) })
map
const result = array.map((value) => value * 2)