Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.95 Safari/537.36
Chrome 55
Mac OS X 10.12.3
Other
7 years ago
Test name Executions per second
undefined 3805574.0 Ops/sec
typeof 11995690.0 Ops/sec
in 11318010.0 Ops/sec
hasOwnProperty 11418500.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty