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Run results for:
null vs. hasOwnProperty
Object lookup performance
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=555029" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0 Safari/605.1.15
Browser:
Safari 18
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
exist null
12759232.0 Ops/sec
exist hasOwnProperty
12308956.0 Ops/sec
nonexist null
12353918.0 Ops/sec
nonexist hasOwnProperty
12001027.0 Ops/sec
Script Preparation code:
var obj = { a: 1, b: 2, c: 3, d: 4, e: 5 };
Tests:
exist null
obj.d != null;
exist hasOwnProperty
obj.hasOwnProperty( 'd' );
nonexist null
obj.f != null;
nonexist hasOwnProperty
obj.hasOwnProperty( 'f' );