Run details:
Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36
Chrome 91
Windows 8.1
Desktop
3 years ago
Test name Executions per second
undefined 679943.6 Ops/sec
typeof 2882516.0 Ops/sec
in 2875960.8 Ops/sec
hasOwnProperty 3246647.5 Ops/sec
bool 3806344.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool