Run details:
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:64.0) Gecko/20100101 Firefox/64.0
Firefox 64
Ubuntu
Desktop
5 years ago
Test name Executions per second
undefined 136033024.0 Ops/sec
typeof 205763296.0 Ops/sec
in 164816688.0 Ops/sec
hasOwnProperty 153047456.0 Ops/sec
bool 202082992.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool