Run details:
Mozilla/5.0 (X11; Linux x86_64; rv:79.0) Gecko/20100101 Firefox/79.0
Firefox 79
Linux
Desktop
4 years ago
Test name Executions per second
undefined 45004012.0 Ops/sec
typeof 126505656.0 Ops/sec
in 71377160.0 Ops/sec
hasOwnProperty 80567624.0 Ops/sec
bool 122507944.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool