Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2.1 Safari/605.1.15
Safari 17
Mac OS X 10.15.7
Desktop
9 months ago
Test name Executions per second
undefined 15350317.0 Ops/sec
typeof 43581740.0 Ops/sec
in 44601212.0 Ops/sec
hasOwnProperty 42355968.0 Ops/sec
bool 43759336.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool


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