Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.108 Safari/537.36
Chrome 63
Windows
Other
6 years ago
Test name Executions per second
undefined 2747073.5 Ops/sec
typeof 9249299.0 Ops/sec
in 9113358.0 Ops/sec
hasOwnProperty 6365150.5 Ops/sec
bool 8480261.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool