Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36
Chrome 83
Mac OS X 10.15.5
Desktop
4 years ago
Test name Executions per second
undefined 4435756.0 Ops/sec
typeof 13183566.0 Ops/sec
in 13080926.0 Ops/sec
hasOwnProperty 11577076.0 Ops/sec
bool 13208110.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool