Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36
Chrome 56
Mac OS X 10.12.3
Other
7 years ago
Test name Executions per second
undefined 847860.8 Ops/sec
typeof 2609160.0 Ops/sec
in 3875457.0 Ops/sec
hasOwnProperty 3414801.0 Ops/sec
bool 6903930.5 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool