Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 11_1_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36
Chrome 88
Mac OS X 11.1.0
Desktop
3 years ago
Test name Executions per second
undefined 5247505.0 Ops/sec
typeof 16475659.0 Ops/sec
in 15787302.0 Ops/sec
hasOwnProperty 14654635.0 Ops/sec
bool 15811535.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool