Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36
Chrome 68
Windows 7
Desktop
6 years ago
Test name Executions per second
undefined 2817485.8 Ops/sec
typeof 9376481.0 Ops/sec
in 8788854.0 Ops/sec
hasOwnProperty 8533831.0 Ops/sec
bool 9450898.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool