Run details:
Mozilla/5.0 (Linux; Android 11; Pixel 3 XL) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.127 Mobile Safari/537.36
Chrome Mobile 85
Android
Mobile
4 years ago
Test name Executions per second
undefined 2344639.0 Ops/sec
typeof 6518159.0 Ops/sec
in 6635415.0 Ops/sec
hasOwnProperty 6109798.0 Ops/sec
bool 6642272.5 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool