Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 11_2_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36
Chrome 89
Mac OS X 11.2.3
Desktop
3 years ago
Test name Executions per second
undefined 5115888.5 Ops/sec
typeof 15197835.0 Ops/sec
in 15413664.0 Ops/sec
hasOwnProperty 13273036.0 Ops/sec
bool 14865428.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool