Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36
Chrome 83
Mac OS X 10.14.6
Desktop
4 years ago
Test name Executions per second
undefined 5150249.5 Ops/sec
typeof 15711166.0 Ops/sec
in 15691336.0 Ops/sec
hasOwnProperty 13172475.0 Ops/sec
bool 15653383.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool