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Run results for:
forEach vs for each vs for of vs for let
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<iframe src="https://measurethat.net/Embed?id=531336" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4.1 Safari/605.1.15
Browser:
Safari 17
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
traditional
388.6 Ops/sec
array method
7986.4 Ops/sec
of
7694.7 Ops/sec
in
202.2 Ops/sec
Script Preparation code:
var count = 100000 var arr = Array.from({length: count});
Tests:
traditional
for(let i=0; i<count; i++){ const x = i; }
array method
arr.forEach(r => { const x = i; })
of
for (let each of arr) { const x = each; }
in
for (let each in arr) { const x = each; }