Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36 OPR/76.0.4017.227
Opera 76
Windows
Desktop
3 years ago
Test name Executions per second
undefined 1059435.8 Ops/sec
typeof 2001764.5 Ops/sec
in 2012825.9 Ops/sec
hasOwnProperty 1892552.2 Ops/sec
bool 1878879.2 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool