Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.36
Chrome 80
Mac OS X 10.13.6
Desktop
4 years ago
Test name Executions per second
undefined 4427659.5 Ops/sec
typeof 14390658.0 Ops/sec
in 14759869.0 Ops/sec
hasOwnProperty 12907054.0 Ops/sec
bool 14801978.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool