Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1 Safari/605.1.15
Safari 14
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
undefined 3576967.0 Ops/sec
typeof 11258948.0 Ops/sec
in 11184728.0 Ops/sec
hasOwnProperty 10952591.0 Ops/sec
bool 11127307.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool