Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 11_2_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36
Chrome 89
Mac OS X 11.2.3
Desktop
3 years ago
Test name Executions per second
undefined 9046409.0 Ops/sec
typeof 26400718.0 Ops/sec
in 26359336.0 Ops/sec
hasOwnProperty 22344892.0 Ops/sec
bool 26385926.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool