Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 11_1_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.96 Safari/537.36
Chrome 88
Mac OS X 11.1.0
Desktop
3 years ago
Test name Executions per second
undefined 5070431.0 Ops/sec
typeof 15582058.0 Ops/sec
in 15483557.0 Ops/sec
hasOwnProperty 13276565.0 Ops/sec
bool 15579342.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool