Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36
Chrome 69
Mac OS X 10.12.6
Desktop
6 years ago
Test name Executions per second
undefined 4211339.5 Ops/sec
typeof 13239354.0 Ops/sec
in 12579990.0 Ops/sec
hasOwnProperty 11969862.0 Ops/sec
bool 12557873.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool