Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Safari/537.36
Chrome 100
Mac OS X 10.15.7
Desktop
2 years ago
Test name Executions per second
undefined 5808631.5 Ops/sec
typeof 17249820.0 Ops/sec
in 18345744.0 Ops/sec
hasOwnProperty 16812264.0 Ops/sec
bool 17982802.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool