Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.27 Safari/537.36 Edg/88.0.705.15
Chrome 88
Windows
Desktop
4 years ago
Test name Executions per second
undefined 4050123.5 Ops/sec
typeof 13554192.0 Ops/sec
in 13663477.0 Ops/sec
hasOwnProperty 12272669.0 Ops/sec
bool 13534637.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool