Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Run results for:
Array isArray vs instanceof vs variable.constructor
Go to the benchmark
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=505915" 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/121.0.0.0 Safari/537.36
Browser:
Chrome 121
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
variable.constructor name
4.4M/s
variable.constructor
3.2M/s
isArray
3.1M/s
Instanceof
3.1M/s
View exact numbers
Test name
Executions per second
✓
variable.constructor name
4,428,698 Ops/sec
variable.constructor
3,173,974 Ops/sec
isArray
3,117,526 Ops/sec
Instanceof
3,112,939 Ops/sec
Script Preparation code:
var test = [1,2,3,4]; var c;
Tests:
Instanceof
if (test instanceof Array) { c++; }
isArray
if (Array.isArray(test)) { c++; }
variable.constructor
if (test.constructor === Array) { c++; }
variable.constructor name
if (test.constructor.name === 'Array') { c++; }