Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36
Chrome 70
Mac OS X 10.14.0
Desktop
5 years ago
Test name Executions per second
undefined 3291956.5 Ops/sec
typeof 11053536.0 Ops/sec
in 10079793.0 Ops/sec
hasOwnProperty 9948956.0 Ops/sec
bool 10925466.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool