Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36
Chrome 69
Windows 7
Desktop
6 years ago
Test name Executions per second
undefined 3508657.2 Ops/sec
typeof 10969191.0 Ops/sec
in 9982427.0 Ops/sec
hasOwnProperty 9858878.0 Ops/sec
bool 10914837.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool