Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.96 Safari/537.36
Chrome 88
Mac OS X 10.14.6
Desktop
3 years ago
Test name Executions per second
undefined 4362770.0 Ops/sec
typeof 12684417.0 Ops/sec
in 12677970.0 Ops/sec
hasOwnProperty 11022947.0 Ops/sec
bool 12668607.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool