Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.80 Safari/537.36
Chrome 86
Mac OS X 10.15.5
Desktop
4 years ago
Test name Executions per second
undefined 5250924.0 Ops/sec
typeof 16097904.0 Ops/sec
in 16082674.0 Ops/sec
hasOwnProperty 14094628.0 Ops/sec
bool 16125423.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool