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Run results for:
undefined vs evaluation vs hasOwnProperty
Object lookup performance
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=576733" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:133.0) Gecko/20100101 Firefox/133.0
Browser:
Firefox 133
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
undefined
447941024.0 Ops/sec
evaluation
492647136.0 Ops/sec
hasOwnProperty
529391520.0 Ops/sec
Script Preparation code:
var obj = { a: 1, b: 2, c: 3, d: 4, e: 5 };
Tests:
undefined
obj['d'] !== undefined;
evaluation
obj['d'];
hasOwnProperty
obj.hasOwnProperty( 'd' );