Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:60.0) Gecko/20100101 Firefox/60.0
Firefox 60
Mac OS X 10.12
Desktop
6 years ago
Test name Executions per second
undefined 118496056.0 Ops/sec
typeof 258810512.0 Ops/sec
in 180719040.0 Ops/sec
hasOwnProperty 188590192.0 Ops/sec
bool 274416352.0 Ops/sec
keys 621199.9 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool

  • keys