Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36
Chrome 89
Windows 7
Desktop
3 years ago
Test name Executions per second
undefined 2805349.0 Ops/sec
typeof 7896542.0 Ops/sec
in 7375568.5 Ops/sec
hasOwnProperty 7289687.0 Ops/sec
bool 7667874.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool