Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36
Chrome 70
Mac OS X 10.12.6
Desktop
5 years ago
Test name Executions per second
undefined 3565689.5 Ops/sec
typeof 11447749.0 Ops/sec
in 10729707.0 Ops/sec
hasOwnProperty 10619145.0 Ops/sec
bool 11971476.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool