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Run results for:
typeof undefined vs. equals
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<iframe src="https://measurethat.net/Embed?id=614689" 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/138.0.0.0 Safari/537.36
Browser:
Chrome 138
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
strict equal undefined
75.3M/s
typeof
68.1M/s
View exact numbers
Test name
Executions per second
✓
strict equal undefined
75,254,392 Ops/sec
typeof
68,136,920 Ops/sec
Tests:
typeof
const foo = "hello"; const defined = typeof foo !== "undefined";
strict equal undefined
const foo = "hello"; const defined = foo !== undefined;