Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36
Chrome 88
Mac OS X 10.14.6
Desktop
3 years ago
Test name Executions per second
undefined 3473578.2 Ops/sec
typeof 10051300.0 Ops/sec
in 10201385.0 Ops/sec
hasOwnProperty 8068156.0 Ops/sec
bool 8991067.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool