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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=568981" 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/128.0.0.0 Safari/537.36 OPR/114.0.0.0
Browser:
Opera 114
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
[].constructor
7.5M/s
Array.isArray
7.4M/s
instanceof
7.1M/s
Object.prototype.toString
6.4M/s
View exact numbers
Test name
Executions per second
✓
[].constructor
7,482,902 Ops/sec
Array.isArray
7,350,010 Ops/sec
instanceof
7,142,400 Ops/sec
Object.prototype.toString
6,423,856 Ops/sec
Tests:
Array.isArray
Array.isArray([])
instanceof
[] instanceof Array
[].constructor
[].constructor === Array
Object.prototype.toString
Object.prototype.toString.call([]) === '[object Array]'