Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36
Chrome 87
Mac OS X 10.15.5
Desktop
4 years ago
Test name Executions per second
undefined 5270217.0 Ops/sec
typeof 15182692.0 Ops/sec
in 14891858.0 Ops/sec
hasOwnProperty 12563404.0 Ops/sec
bool 15182334.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool