Run details:
Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:71.0) Gecko/20100101 Firefox/71.0
Firefox 71
Windows 7
Desktop
5 years ago
Test name Executions per second
undefined 128408112.0 Ops/sec
typeof 238163136.0 Ops/sec
in 185009984.0 Ops/sec
hasOwnProperty 182395648.0 Ops/sec
bool 240508080.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool