Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36
Chrome 80
Linux
Desktop
4 years ago
Test name Executions per second
undefined 5965249.5 Ops/sec
typeof 17974814.0 Ops/sec
in 17955792.0 Ops/sec
hasOwnProperty 14300330.0 Ops/sec
bool 17933994.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool