Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Safari/537.36
Chrome 100
Mac OS X 10.15.7
Desktop
2 years ago
Test name Executions per second
Delete 6079053.5 Ops/sec
Set undefined 2257043.5 Ops/sec
Script Preparation code:
AخA
 
var obj = {a:1, b:2, c:3, d:4};
Tests:
  • Delete

     
    delete obj.a;
    delete obj.b;
    delete obj.c;
    delete obj.d;
  • Set undefined

     
    obj.a = undefined;
    obj.b = undefined;
    obj.c = undefined;
    obj.d = undefined;