Re: [Aspectsharp-users] IInvocation.Proxy and IInvocation.InvocationTarget

[Deyan P. <de...@ho...>]

Hi hammett,

Great, thanks a lot for the modification!!! Now it looks really great. I
have currently implemented a project with explicit proxies for lazy-loading,
and I am thinking of replacing them with the more transparent Dynamic
Proxies, that's why I am delving into the stuff...

I did some tests and the results are a little bit strange ... I have changed
the retrieval of the objects, so that they are loaded from the db now. The
full code is here:
http://www20.brinkster.com/deyanp/dynproxy/DynamicProxyAvalonTest.zip

Class1.cs looks now like this:

using System;

namespace DynamicProxyAvalonTest
{
 class Class1
 {
  [STAThread]
  static void Main(string[] args)
  {
   Test(1000, 1, true);
   Test(1000, 1, false);
   Test(1000, 1, true);
   Test(1000, 1, false);
   Test(1000, 1, true);
   Test(1000, 1, false);
   Test(1000, 1, true);
   Test(1000, 1, false);

   Test(1000, 100, true);
   Test(1000, 100, false);
   Test(1000, 100, true);
   Test(1000, 100, false);
   Test(1000, 100, true);
   Test(1000, 100, false);
   Test(1000, 100, true);
   Test(1000, 100, false);

   Test(1000, 1000, true);
   Test(1000, 1000, false);
   Test(1000, 1000, true);
   Test(1000, 1000, false);
   Test(1000, 1000, true);
   Test(1000, 1000, false);
   Test(1000, 1000, true);
   Test(1000, 1000, false);

   Console.ReadLine();
  }

  public static void Test(int maxi, int maxj, bool useProxy)
  {
   int start = Environment.TickCount;
   int i = 0;
   int j = 0;
   for(i=0;i<maxi;i++)
   {
    //useProxy=true lazy-loads the referenced country
    //a dynamic proxy is stuffed in
    //altogether 2 db calls: 1 for the user
    //and later 1 for the country
    //useProxy=false eager-loads the referenced country
    //the country is directly retrieved from the db upon retrieval of the
user
    //in a separate db call
    //altogether 2 db calls: 1 for the user
    //and immediately another 1 for the country
    User user = UserDA.Select(1830, useProxy);
    for(j=0;j<maxj;j++)
    {
     int d = user.ID;
     string n = user.Name;
     if(user.Country != null)
     {
      int d2 = user.Country.ID;
      string n2 = user.Country.Name;
     }
    }
   }
   int end = Environment.TickCount;
   Console.WriteLine(String.Format("Loop[i={0},j={1}] useProxy={2}
Test:\t\t\t{3}", i, j, useProxy, end - start));

  }
 }
}


The results are the following:

Loop[i=1000,j=1] useProxy=True Test:                    1219
Loop[i=1000,j=1] useProxy=False Test:                   781
Loop[i=1000,j=1] useProxy=True Test:                    890
Loop[i=1000,j=1] useProxy=False Test:                   782
Loop[i=1000,j=1] useProxy=True Test:                    890
Loop[i=1000,j=1] useProxy=False Test:                   813
Loop[i=1000,j=1] useProxy=True Test:                    906
Loop[i=1000,j=1] useProxy=False Test:                   812
Loop[i=1000,j=100] useProxy=True Test:                  1485
Loop[i=1000,j=100] useProxy=False Test:                 734
Loop[i=1000,j=100] useProxy=True Test:                  1406
Loop[i=1000,j=100] useProxy=False Test:                 719
Loop[i=1000,j=100] useProxy=True Test:                  1406
Loop[i=1000,j=100] useProxy=False Test:                 766
Loop[i=1000,j=100] useProxy=True Test:                  1437
Loop[i=1000,j=100] useProxy=False Test:                 766
Loop[i=1000,j=1000] useProxy=True Test:                 5859
Loop[i=1000,j=1000] useProxy=False Test:                 813
Loop[i=1000,j=1000] useProxy=True Test:                 5859
Loop[i=1000,j=1000] useProxy=False Test:                  813
Loop[i=1000,j=1000] useProxy=True Test:                 5843
Loop[i=1000,j=1000] useProxy=False Test:                  922
Loop[i=1000,j=1000] useProxy=True Test:                 6031
Loop[i=1000,j=1000] useProxy=False Test:                  891


It seems that the inner loop causes performance problems - if the value is 1
then there is almost no difference between the proxy and no proxy versions,
but if it is 1000, then the difference is 6x.

Let me know what you think about this, if you find time for that. I will
continue investigating the issue tomorrow.


Best regards,
Deyan