Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:100.0) Gecko/20100101 Firefox/100.0
Firefox 100
Mac OS X 10.15
Desktop
2 years ago
Test name Executions per second
undefined 1010811648.0 Ops/sec
hasOwnProperty 1027760192.0 Ops/sec
Script Preparation code:
AخA
 
var obj = { a: 1, b: 2, c: 3, d: 4, e: 5 };
Tests:
  • undefined

     
    if(obj.d){};
  • hasOwnProperty

     
    if(obj.hasOwnProperty('d')){}