Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36
Chrome 86
Mac OS X 10.14.6
Desktop
4 years ago
Test name Executions per second
undefined 3500947.2 Ops/sec
typeof 10588593.0 Ops/sec
in 10326194.0 Ops/sec
hasOwnProperty 9662157.0 Ops/sec
bool 10507664.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool