Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.2 Safari/605.1.15
Safari 14
Mac OS X 10.15.6
Desktop
4 years ago
Test name Executions per second
undefined 5503975.5 Ops/sec
typeof 15375822.0 Ops/sec
in 15403666.0 Ops/sec
hasOwnProperty 15415056.0 Ops/sec
bool 15553736.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool