Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36
Chrome 74
Mac OS X 10.13.6
Desktop
5 years ago
Test name Executions per second
undefined 5291933.5 Ops/sec
typeof 15267553.0 Ops/sec
in 15248123.0 Ops/sec
hasOwnProperty 13404166.0 Ops/sec
bool 15214960.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool