Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.99 Safari/537.36
Chrome 97
Windows
Desktop
2 years ago
Test name Executions per second
undefined 4280178.0 Ops/sec
typeof 11662700.0 Ops/sec
in 11588356.0 Ops/sec
hasOwnProperty 10096405.0 Ops/sec
bool 11546040.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool