Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0
Firefox 70
Windows
Desktop
4 years ago
Test name Executions per second
undefined 162890464.0 Ops/sec
typeof 312032288.0 Ops/sec
in 229688144.0 Ops/sec
hasOwnProperty 225786416.0 Ops/sec
bool 309596128.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool