Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.4 Safari/605.1.15
Safari 15
Mac OS X 10.15.7
Desktop
2 years ago
Test name Executions per second
undefined 9481692.0 Ops/sec
typeof 27944530.0 Ops/sec
in 27964772.0 Ops/sec
hasOwnProperty 27319258.0 Ops/sec
bool 27303326.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool