Question

First let me start with an example,

Public Class EmpDemo

    Public Function getEmpData() as DataSet
    End Function 

End Class

Case 1:

Dim ds as New DataSet   'A DataSet instance gets created here
ds = EmpDemo.getEmpData()    'Another DataSet instance gets created here

Case 2:

Dim ds as DataSet
ds = EmpDemo.getEmpData()  'A single instance gets created here

Question:

How it will effect page performance if I choose Case 1 ? How I prove Case 2 is best choice?

Answer 1

The performance difference will be negligible, but Case 2 is obviously the better choice. Adding code that does nothing useful, in this case creating an object instance that you never use, just pollutes your code base.