Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36
Chrome 69
Mac OS X 10.13.6
Desktop
6 years ago
Test name Executions per second
undefined 2876084.8 Ops/sec
typeof 9258928.0 Ops/sec
in 8342879.5 Ops/sec
hasOwnProperty 7575667.5 Ops/sec
bool 9542341.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool