Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36
Chrome 75
Windows 7
Desktop
5 years ago
Test name Executions per second
undefined 3770907.0 Ops/sec
typeof 9711082.0 Ops/sec
in 9766692.0 Ops/sec
hasOwnProperty 7969687.0 Ops/sec
bool 9787669.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool