Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36
Chrome 67
Mac OS X 10.13.6
Desktop
6 years ago
Test name Executions per second
undefined 2011259.8 Ops/sec
typeof 7860885.0 Ops/sec
in 6875070.5 Ops/sec
hasOwnProperty 6572654.5 Ops/sec
bool 7138587.5 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool