Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36
Chrome 70
Windows
Desktop
6 years ago
Test name Executions per second
undefined 4758913.5 Ops/sec
typeof 15487807.0 Ops/sec
in 14082416.0 Ops/sec
hasOwnProperty 14094858.0 Ops/sec
bool 15499206.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool