Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36
Chrome 70
Mac OS X 10.14.1
Desktop
6 years ago
Test name Executions per second
undefined 4701483.0 Ops/sec
typeof 15088218.0 Ops/sec
in 14255424.0 Ops/sec
hasOwnProperty 13951434.0 Ops/sec
bool 15384075.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool