Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.55 Safari/537.36
Chrome 96
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
undefined 4585217.5 Ops/sec
typeof 13494749.0 Ops/sec
in 13375998.0 Ops/sec
hasOwnProperty 11556760.0 Ops/sec
bool 13118754.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool