Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.1.2 Safari/605.1.15
Safari 17
Mac OS X 10.15.7
Desktop
10 months ago
Test name Executions per second
undefined 3778322.5 Ops/sec
typeof 10623384.0 Ops/sec
in 11081397.0 Ops/sec
hasOwnProperty 11342760.0 Ops/sec
bool 11355334.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool