Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Run results for:
instanceof vs property in
Measure the performance of instanceOf operator vs property in operator
Go to the benchmark
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=563780" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 YaBrowser/24.7.0.0 Safari/537.36
Browser:
Yandex Browser 24
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
instanceof
16125981.0 Ops/sec
property undefined
15136767.0 Ops/sec
property in
41419912.0 Ops/sec
HTML Preparation code:
<script> class TestClass { constructor() { this.a = 2; } } </script>
Script Preparation code:
var obj = new TestClass();
Tests:
instanceof
obj instanceof TestClass;
property undefined
obj.a !== undefined
property in
'a' in obj