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Run results for:
isArray vs instanceof vs typeof
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=605020" 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/135.0.0.0 Safari/537.36
Browser:
Chrome 135
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
typeof
4.5M/s
isArray
4.5M/s
instanceof
4.4M/s
View exact numbers
Test name
Executions per second
✓
typeof
4,516,910 Ops/sec
isArray
4,514,873 Ops/sec
instanceof
4,432,168 Ops/sec
Script Preparation code:
var test = [1,2,3,4]; var c;
Tests:
typeof
if (typeof test === 'object') { c++; }
isArray
if (Array.isArray(test)) { c++; }
instanceof
if (test instanceof Array) { c++; }