Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.5 Safari/605.1.15
Safari 13
Mac OS X 10.13.6
Desktop
4 years ago
Test name Executions per second
undefined 1852407.9 Ops/sec
typeof 5968511.0 Ops/sec
in 6039290.5 Ops/sec
hasOwnProperty 5881456.5 Ops/sec
bool 6047110.5 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool