Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:63.0) Gecko/20100101 Firefox/63.0
Firefox 63
Windows
Desktop
6 years ago
Test name Executions per second
undefined 69159568.0 Ops/sec
typeof 177961968.0 Ops/sec
in 95547736.0 Ops/sec
hasOwnProperty 97241040.0 Ops/sec
bool 175011408.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool