Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.4 Safari/605.1.15
Safari 16
Mac OS X 10.15.7
Desktop
one year ago
Test name Executions per second
undefined 10198630.0 Ops/sec
typeof 29894178.0 Ops/sec
in 30273816.0 Ops/sec
hasOwnProperty 29611090.0 Ops/sec
bool 29842320.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool