Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.81 Safari/537.36
Chrome 69
Mac OS X 10.13.6
Desktop
6 years ago
Test name Executions per second
undefined 3260213.2 Ops/sec
typeof 11532292.0 Ops/sec
in 10747876.0 Ops/sec
hasOwnProperty 5394996.5 Ops/sec
bool 11711743.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool