Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36
Chrome 86
Mac OS X 10.14.6
Desktop
4 years ago
Test name Executions per second
undefined 5224233.0 Ops/sec
typeof 16600504.0 Ops/sec
in 16603320.0 Ops/sec
hasOwnProperty 14771077.0 Ops/sec
bool 16858308.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool