Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:60.0) Gecko/20100101 Firefox/60.0
Firefox 60
Mac OS X 10.12
Desktop
5 years ago
Test name Executions per second
undefined 122668700.0 Ops/sec
typeof 191257000.0 Ops/sec
in 154689100.0 Ops/sec
hasOwnProperty 147061100.0 Ops/sec
bool 199171700.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool