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 120586936.0 Ops/sec
typeof 246977664.0 Ops/sec
in 185552016.0 Ops/sec
hasOwnProperty 185895488.0 Ops/sec
bool 247308928.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool