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Run results for:
Number.isInteger() vs typeof
Is it faster to detect if a variable is an integer or is it faster to use typeof to verify the type?
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<iframe src="https://measurethat.net/Embed?id=604031" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64; rv:136.0) Gecko/20100101 Firefox/136.0
Browser:
Firefox 136
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
typeof positive
1531.8M/s
typeof negative
1497.4M/s
Number.isInteger() negative
1445.3M/s
Number.isInteger() positive
1311.5M/s
View exact numbers
Test name
Executions per second
✓
typeof positive
1,531,819,392 Ops/sec
typeof negative
1,497,396,352 Ops/sec
Number.isInteger() negative
1,445,254,912 Ops/sec
Number.isInteger() positive
1,311,527,296 Ops/sec
Tests:
Number.isInteger() positive
Number.isInteger(3) === true
typeof positive
typeof 3 === "number";
Number.isInteger() negative
Number.isInteger("three") === false
typeof negative
typeof "three" === "number";