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Run results for:
Array.isArray vs Object.prototype.toString vs [].constructor vs instanceof
Array.isArray vs Object.prototype.toString vs [].constructor vs instanceof
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<iframe src="https://measurethat.net/Embed?id=606331" 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/136.0.0.0 Safari/537.36 Edg/136.0.0.0
Browser:
Chrome 136
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Array.isArray
128.8M/s
[].constructor
110.4M/s
instanceof
94.0M/s
Object.prototype.toString
64.3M/s
View exact numbers
Test name
Executions per second
✓
Array.isArray
128,821,568 Ops/sec
[].constructor
110,363,120 Ops/sec
instanceof
93,999,448 Ops/sec
Object.prototype.toString
64,276,124 Ops/sec
Tests:
Array.isArray
Array.isArray([])
instanceof
[] instanceof Array
[].constructor
[].constructor === Array
Object.prototype.toString
Object.prototype.toString.call([]) === '[object Array]'