Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:74.0) Gecko/20100101 Firefox/74.0
Firefox 74
Windows 7
Desktop
4 years ago
Test name Executions per second
undefined 54666992.0 Ops/sec
typeof 86770432.0 Ops/sec
in 64287928.0 Ops/sec
hasOwnProperty 63836212.0 Ops/sec
bool 84749328.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool