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Run results for:
isArray vs instanceof vs typeof
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<iframe src="https://measurethat.net/Embed?id=589581" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36
Browser:
Chrome 133
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
typeof
13.3M/s
instanceof
13.2M/s
isArray
13.0M/s
View exact numbers
Test name
Executions per second
✓
typeof
13,251,956 Ops/sec
instanceof
13,220,936 Ops/sec
isArray
12,989,316 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++; }