Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36
Chrome 78
Mac OS X 10.15.1
Desktop
5 years ago
Test name Executions per second
undefined 4659138.0 Ops/sec
typeof 13082620.0 Ops/sec
in 13082401.0 Ops/sec
hasOwnProperty 11367834.0 Ops/sec
bool 13056321.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool