Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.36
Chrome 81
Windows 7
Desktop
4 years ago
Test name Executions per second
undefined 1863407.2 Ops/sec
typeof 5388949.5 Ops/sec
in 5327916.5 Ops/sec
hasOwnProperty 4889080.0 Ops/sec
bool 5199771.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool