Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36 OPR/67.0.3575.137
Opera 67
Windows
Desktop
4 years ago
Test name Executions per second
undefined 2167410.5 Ops/sec
typeof 6494454.0 Ops/sec
in 6524150.0 Ops/sec
hasOwnProperty 5867383.0 Ops/sec
bool 6474003.5 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool