Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36
Chrome 63
Mac OS X 10.12.0
Other
2025 years ago
Test name Executions per second
undefined 3831139.0 Ops/sec
typeof 12088895.0 Ops/sec
in 10973502.0 Ops/sec
hasOwnProperty 10730790.0 Ops/sec
bool 12049710.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool