Re: Speed of C# and GDI+

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Date: Sat, 1 May 2004 15:58:32 -0400

I tried to use C# for a senior design project - it entailed plotting a lot
of points. I found C# to be extremely slow. For a start, I really hated that
when the application first came up the CPU activity would shoot to 100% for
a few secs (Ipaq 4155).

But presenting the demo of our project was a success because I was able to
make the demo very quickly, however, the real (working) app is now in C++.

"Mateusz Łoskot" <antispam@see.my.signature> wrote in message
news:gqdkc.578624$Or1.194762@news.chello.at...
> Hello,
>
> I'm going to go with my project one of two possible ways
> and I have to make some decisions. First, I'd like
> to know more details and others experiences.
>
> I have an ActiveX component which draws a lot of geometries
> (lines, points,polygons) and manages
> large amount of objects of geometries (hundreds and even thousands).
> I would like to use it under Pocket PC with .NET
> Compact Framework without the Odyssey CFCOM solution.
> As we know, Compact Framework does not support ActiveX
> hosting at all (natively).
> So, there are two possibilities for me:
>
> 1 - try to make my ActiveX simple COM object without any GUI elements
> and serving only data structures and geometries computations
> and geometries would be drawn by GDI+ (.NET CF).
>
> 2 - use only C++ and native code.
>
> The former would provide me with .NET advantages and faster
> GUI development but as I know there are performance limitations.
> Am I right ? What about my architecture of geometries rendering
> using GDI + ? What about the performance ?
> The latter solution gives me the best control over
> my application and components, but it's harder
> to develop GUI and other things.
>
> If I'd choose the first one, I have to redevelop my ActiveX
> to simple COM DLL wrapped by P/Invoke without any GUI objects
> (no ActiveX elements).
> The question is how it (P/Invoke, marshaling, etc.) will
> influence the performance of my application ?
> Are graphics operations under .NET CF fast ?
> Is there any comparsion ?
>
> Are there people having similar problems with making
> decision about going unmanage C++ or managed .NET CF way ?
> Could you share your experience ?
>
> Thanks for any information !
>
> BTW, I post it on two newsgroups,
> microsoft.public.dotnet.framework.compactframework
> and microsoft.public.pocketpc.developer.
> If I broke netiquete, forgive me ;-)
>
> --
>
> Mateusz Łoskot
> mateusz at loskot dot net

• Previous message: Jesse Pasichnyk: "Serializing structs in eVC++ 4.0"
• Next in thread: Lloyd Dupont: "Re: Speed of C# and GDI+"
• Reply: Lloyd Dupont: "Re: Speed of C# and GDI+"
• Maybe reply: Kartal: "Re: Speed of C# and GDI+"
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