Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36
Chrome 70
Windows
Desktop
6 years ago
Test name Executions per second
undefined 4111543.0 Ops/sec
typeof 12689058.0 Ops/sec
in 11724823.0 Ops/sec
hasOwnProperty 11619074.0 Ops/sec
bool 12890530.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool