Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36
Chrome 70
Windows 7
Desktop
6 years ago
Test name Executions per second
undefined 2642440.2 Ops/sec
typeof 8868372.0 Ops/sec
in 8028891.0 Ops/sec
hasOwnProperty 7966508.5 Ops/sec
bool 8890961.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool