Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36
Chrome 92
Linux
Desktop
3 years ago
Test name Executions per second
undefined 3551596.2 Ops/sec
typeof 11956458.0 Ops/sec
in 11907416.0 Ops/sec
hasOwnProperty 10577983.0 Ops/sec
bool 12168596.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool