Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36
Chrome 86
Mac OS X 10.14.6
Desktop
4 years ago
Test name Executions per second
undefined 3317111.8 Ops/sec
typeof 10564700.0 Ops/sec
in 10562384.0 Ops/sec
hasOwnProperty 9423845.0 Ops/sec
bool 10300489.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool