Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36
Chrome 79
Mac OS X 10.14.5
Desktop
4 years ago
Test name Executions per second
undefined 6516833.0 Ops/sec
typeof 18839906.0 Ops/sec
in 18776670.0 Ops/sec
hasOwnProperty 16888008.0 Ops/sec
bool 18738210.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool