C++ speed is not consistant and C# is. Why?

[aewarnick]

This is actually, in my opinion, a very weird happening. I have a c++ program that stretches an image in the entire window and then draws that same image at normal size whereever the mouse moves.

 

It works great and fast if I have another large program open like VS. But if I just have dev and the program running the drawing is slower than C# is.

 

But C# remains the same.

 

Is there something that .net does that my little c++ app does not that could cause that wierdness?

[iebidan]

Can you post an example to see it???

[Bucky]

Actually, this makes a lot of sense. In C#, the code is compiled

every time before execution, so the only speed hit you will see

in the IDE versus outside the IDE is in the fact that the debugger

is attached to the app. Now I'm not sure how VC++ works in

terms of debugging, but it sounds like it's doing something slow

while debugging. In any case, the final compiled app will always

be somewhat faster than its debugged counterpart, and you

do not necessarily need to worry about the speed of your app if

it's slow in the IDE.

[aewarnick]

Let me explain better. I used Dev-C++ to create the C++ app and it has no runtimes. I am not using debug and Dev doesn't even have to be open for this weird thing to happen. I posted the same question here:

http://www.vbforums.com/showthread.php?s=&threadid=271594