Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36 Edg/88.0.705.63
Chrome 88
Windows
Desktop
3 years ago
Test name Executions per second
undefined 2931788.0 Ops/sec
typeof 9612453.0 Ops/sec
in 9704793.0 Ops/sec
hasOwnProperty 8796145.0 Ops/sec
bool 9761442.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool