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Run results for:
undefined vs. typeof vs. in vs. hasOwnProperty
Object lookup performance
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<iframe src="https://measurethat.net/Embed?id=622274" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36
Browser:
Chrome 142
Operating system:
Linux
Device Platform:
Desktop
Date tested:
4 months ago
Test name
Executions per second
hasOwnProperty
102402480.0 Ops/sec
bool with Array
184265712.0 Ops/sec
bool
199365168.0 Ops/sec
Script Preparation code:
var obj = { a: 1, b: 2, c: 3, d: 4, e: 5 };
Tests:
hasOwnProperty
obj.hasOwnProperty( 'd' );
bool with Array
!! obj['d'];
bool
!! obj.d;