Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36
Chrome 86
Mac OS X 10.15.6
Desktop
4 years ago
Test name Executions per second
undefined 5291963.0 Ops/sec
typeof 16559047.0 Ops/sec
in 16245291.0 Ops/sec
hasOwnProperty 13199776.0 Ops/sec
bool 13843295.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool