Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.23 Safari/537.36
Chrome 69
Windows
Desktop
6 years ago
Test name Executions per second
undefined 5354405.5 Ops/sec
typeof 16634838.0 Ops/sec
in 15190387.0 Ops/sec
hasOwnProperty 15162796.0 Ops/sec
bool 16694349.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool