Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.75 Safari/537.36
Chrome 68
Windows 7
Desktop
3 years ago
Test name Executions per second
in operator 6990547.5 Ops/sec
!==undefined comparison 2352455.0 Ops/sec
Script Preparation code:
Tests:
  • in operator

  • !==undefined comparison