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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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
Chrome 131
Windows
Desktop
one year ago
Test name Executions per second
Number.isInteger() positive 142764800.0 Ops/sec
typeof positive 178711984.0 Ops/sec
Number.isInteger() negative 143607936.0 Ops/sec
typeof negative 184021136.0 Ops/sec
Tests:

  • Number.isInteger() positive

  • typeof positive

  • Number.isInteger() negative

  • typeof negative