Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:63.0) Gecko/20100101 Firefox/63.0
Firefox 63
Windows
Desktop
6 years ago
Test name Executions per second
undefined 177917056.0 Ops/sec
typeof 330576608.0 Ops/sec
in 245060432.0 Ops/sec
hasOwnProperty 238972352.0 Ops/sec
bool 328667776.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool