Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.97 Safari/537.36
Chrome 78
Linux
Desktop
5 years ago
Test name Executions per second
undefined 5416081.5 Ops/sec
typeof 14678976.0 Ops/sec
in 14602186.0 Ops/sec
hasOwnProperty 12832637.0 Ops/sec
bool 14328970.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool