Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.63 Safari/537.36
Chrome 93
Windows
Desktop
3 years ago
Test name Executions per second
undefined 4758570.5 Ops/sec
typeof 11512521.0 Ops/sec
in 11962249.0 Ops/sec
hasOwnProperty 11745332.0 Ops/sec
bool 7865403.5 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool