Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.140 Safari/537.36 Edge/17.17134
Edge 17.17134
Windows
Desktop
6 years ago
Test name Executions per second
undefined 10744052.0 Ops/sec
typeof 74676144.0 Ops/sec
in 17839294.0 Ops/sec
hasOwnProperty 21401440.0 Ops/sec
bool 71275040.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool