Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:74.0) Gecko/20100101 Firefox/74.0
Firefox 74
Windows
Desktop
4 years ago
Test name Executions per second
undefined 151486208.0 Ops/sec
typeof 285860960.0 Ops/sec
in 188919280.0 Ops/sec
hasOwnProperty 219711056.0 Ops/sec
bool 293274048.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool