Run results for: undefined vs null vs bool vs isInteger check

type check performance

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2 Safari/605.1.15
Safari 17
Mac OS X 10.15.7
Desktop
one year ago
IsInteger
695.9M/s
bool
682.9M/s
undefined
663.5M/s
typeof
658.2M/s
View exact numbers
Test name Executions per second
✓ IsInteger 695,858,688 Ops/sec
bool 682,934,656 Ops/sec
undefined 663,471,488 Ops/sec
typeof 658,224,128 Ops/sec
Script Preparation code:
Tests: