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 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36
Chrome 133
Mac OS X 10.15.7
Desktop
one year ago
Test name Executions per second
Number.isInteger() positive 226372176.0 Ops/sec
typeof positive 230829664.0 Ops/sec
Number.isInteger() negative 232006928.0 Ops/sec
typeof negative 233062928.0 Ops/sec
Tests:

  • Number.isInteger() positive

  • typeof positive

  • Number.isInteger() negative

  • typeof negative