Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 11_2_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36
Chrome 89
Mac OS X 11.2.1
Desktop
3 years ago
Test name Executions per second
undefined 5770698.0 Ops/sec
typeof 16825896.0 Ops/sec
in 16844878.0 Ops/sec
hasOwnProperty 14704499.0 Ops/sec
bool 16830954.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool