Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36
Chrome 70
Mac OS X 10.13.6
Desktop
6 years ago
Test name Executions per second
undefined 3840806.5 Ops/sec
typeof 12361744.0 Ops/sec
in 11359767.0 Ops/sec
hasOwnProperty 10858396.0 Ops/sec
bool 12220811.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool