Run details:
Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36
Chrome 75
Windows 8.1
Desktop
5 years ago
Test name Executions per second
undefined 3667857.2 Ops/sec
typeof 9093341.0 Ops/sec
in 9027836.0 Ops/sec
hasOwnProperty 8425073.0 Ops/sec
bool 9094543.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool