Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0
Firefox 70
Windows
Desktop
5 years ago
Test name Executions per second
undefined 178411168.0 Ops/sec
typeof 382139232.0 Ops/sec
in 261186352.0 Ops/sec
hasOwnProperty 267566224.0 Ops/sec
bool 387337056.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool