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Run results for:
typeof undefined vs. equals
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<iframe src="https://measurethat.net/Embed?id=606065" 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/136.0.0.0 Safari/537.36
Browser:
Chrome 136
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
typeof
187806096.0 Ops/sec
strict equal undefined
175631648.0 Ops/sec
Tests:
typeof
const foo = "hello"; const defined = typeof foo !== "undefined";
strict equal undefined
const foo = "hello"; const defined = foo !== undefined;