Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0
Firefox 81
Windows
Desktop
4 years ago
Test name Executions per second
undefined 122964368.0 Ops/sec
typeof 223166192.0 Ops/sec
in 173431088.0 Ops/sec
hasOwnProperty 164966704.0 Ops/sec
bool 229139984.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool