Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:67.0) Gecko/20100101 Firefox/67.0
Firefox 67
Windows
Desktop
5 years ago
Test name Executions per second
undefined 145463024.0 Ops/sec
typeof 276247744.0 Ops/sec
in 206361360.0 Ops/sec
hasOwnProperty 199532704.0 Ops/sec
bool 279488032.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool