Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 11_0_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36
Chrome 87
Mac OS X 11.0.1
Desktop
4 years ago
Test name Executions per second
undefined 7319339.5 Ops/sec
typeof 26351326.0 Ops/sec
in 26300610.0 Ops/sec
hasOwnProperty 22600750.0 Ops/sec
bool 26357050.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool