mfc, Directory of my running app.

1. Why x64 app runs slower than x86 app ?

I have played with Parallel Extensions and noticed to my surprise that
executable compiled for x64 runs slower than compiled for x86:

    private static double HeavyMath( int I )
    {
      double D1 = Math.Sqrt( I ) * Math.Pow( I, Math.PI ) * Math.Pow( I, 1 / 
Math.E );
      double D2 = Math.Sqrt( I ) / Math.Pow( I, Math.PI ) / Math.Pow( I, 1 / 
Math.E );
      return D1 / D2 + D2 / D1;
    }

    private static double Sequential( int N )
    {
      double R = 0;
      for ( int I = 1; I <= N; I++ )
      {
        double D = HeavyMath( I );
        R += D;
      }
      return R;
    }

    private static object lockThis = new object();

    private static double Parallel1( int N )
    {
      double R = 0;
      Parallel.For( 1, N + 1,
        I =>
        {
          double D = HeavyMath( I );
          lock ( lockThis )
          {
            R += D;
          }
        }
      );
      return R;
    }

    private static void CallMethod( Func<int, double> M )
    {
      Stopwatch SW;
      double D;
      const int N = 20000000;

      SW = Stopwatch.StartNew();
      D = M( N );
      SW.Stop();
      Console.WriteLine( "{0}: {1:F0}", M.Method.Name, D );
      Console.WriteLine( "{0}: {1} ms", M.Method.Name, 
SW.ElapsedMilliseconds );
    }

    static void Main( string[] args )
    {
      CallMethod( Sequential );
      CallMethod( Parallel1 );
    }

Sequential method takes ~11,2 sec if compiled for x64, but only ~9,8 sec if 
compiled for x86.
Parallel1 method takes ~7,1 sec if compiled for x64, but only ~6,7 sec if 
compiled for x86.

Environment is VS2008, Vista Ultimate 64-bit, Core 2 Duo 2.40 GHz.

Are such times result from use of double arithmetic ?
Or what else ?

Oleg Subachev 

2. Run WinForms app as Console app - CSharp/C#

3. C++ App to Run in DOS and Launch Another App

I have a problem that I can't seem to solve:

I need to write a C++ app that will run off of a floppy.
Basically, I will boot into DOS (from a floppy), and run my
executable
from the floppy.  The executable will crunch some data and then
launch
another application.


How can I launch the other application?


I've tried system(), but it needs a specific path, which isn't viable
in DOS mode.  The two apps will be in the same directory, so
basically
this is the process:


CrunchData();
LaunchApp();


How could I launch the other app?  I don't think ShellExecute() or the
Process class will work since this will be running in DOS, but I may
be wrong.



Thanks so much.

4. Security exception -- running assembly from a shared directory - CSharp/C#

5. dll dependency cannot be copied to the run directory error

Hi,

I got an application which incorporate many other dll controls. When I
integrated the builds from other person, I get this error all over the
place


Error: The dependency 'MyDAL, Version 1.0.2482.21839, Culture=neutral'
in project 'Controller' cannot be copied to the run directory because
it would conflict with dependency 'MyDAL, Version=1.0.2475.19815,
Culture=neutral.

I got many more of these when adding the new MyDAL project to my
application. How do I fix this?

Thanks

6. Get Directory of Running Executable - CSharp/C#

7. Deploying VC 7.1 run time DLLs to the system directory

8. Set ASPNET Version for Virtual Directory from C# App - Asp.Net