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Run results for:
string split vs indexOf vs yield
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<iframe src="https://measurethat.net/Embed?id=522489" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
Browser:
Chrome 124
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
split
11.7 Ops/sec
indexOf
23.8 Ops/sec
yield
25.2 Ops/sec
Script Preparation code:
var str = "123 ".repeat(1000000)
Tests:
split
var split = str.split(" ") var count = 0; for (const s of split) count++;
indexOf
var count = 0; var i = 0; while (i >= 0) { count++; i = str.indexOf(" ", i + 1); }
yield
function* splitIter(str, needle) { let i = 0; while (i >= 0) { const iOld = i; i = str.indexOf(" ", i + 1); if (i > 0) yield str.substring(iOld, i) else if (iOld < str.length) yield str.substring(iOld) } } let count = 0 for (const s of splitIter(str, " ")) count++;