Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36
Chrome 67
Mac OS X 10.11.2
Desktop
6 years ago
Test name Executions per second
undefined 3613593.5 Ops/sec
typeof 13180942.0 Ops/sec
in 12241281.0 Ops/sec
hasOwnProperty 11912327.0 Ops/sec
bool 13292169.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool