Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.186 Safari/537.36
Chrome 64
Windows 7
Desktop
6 years ago
Test name Executions per second
undefined 3838975.2 Ops/sec
typeof 12562520.0 Ops/sec
in 11746147.0 Ops/sec
hasOwnProperty 11575620.0 Ops/sec
bool 12560783.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool