Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36
Chrome 79
Windows 7
Desktop
4 years ago
Test name Executions per second
undefined 1967929.2 Ops/sec
typeof 5171707.5 Ops/sec
in 5140966.0 Ops/sec
hasOwnProperty 4724517.5 Ops/sec
bool 5110423.5 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool