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Run results for:
iterating through arrays (for .. of vs forEach) [noop in for of]
compare for ..of iteration speed with forEach method
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<iframe src="https://measurethat.net/Embed?id=612802" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Firefox/128.0
Browser:
Firefox 128
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
forEach
122K/s
for .. of
49K/s
View exact numbers
Test name
Executions per second
✓
forEach
122,304 Ops/sec
for .. of
49,072 Ops/sec
Script Preparation code:
globalThis.testArray = Array(1000).fill(0).map((_, i) => i); globalThis.noop = () => {};
Tests:
for .. of
for (const v of testArray) { noop() }
forEach
testArray.forEach(noop);