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typeof undefined vs. equals
(version: 1)
Comparing performance of:
typeof vs strict equal undefined
Created:
one year ago
by:
Guest
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Tests:
typeof
const foo = "hello"; const defined = typeof foo !== "undefined";
strict equal undefined
const foo = "hello"; const defined = foo !== undefined;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
typeof
strict equal undefined
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
9 months ago
)
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/OS:
Chrome 138 on Windows
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<iframe src="https://measurethat.net/Embed?id=614689" width="100%" height="500px"></iframe>
Test name
Executions per second
typeof
68136920.0 Ops/sec
strict equal undefined
75254392.0 Ops/sec
Related benchmarks:
typeof Undefined vs ===
overwrite string vs null vs const two
Typeof x === 'undefined' vs x === undefined
typeof undefined vs strict equal vs equal
Typeof x === 'undefined' vs x === undefined (test without syntax error)
typeof undefined vs === undefined
if(typeof <var> ===undefined) vs if(<var>)
typeof-not-undefined
typeof !== undefined vs strict !equal
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