Conversion to 2.0 (thro' vs2005) from 1.1, has made the app completely
unusable because of the performance degradation. It's a c# winforms,
multithreaded app, using datasets extensively.

I understand that in 2.0 Dataset/dataTable have become more performant, and
I was expecting a performance improvement. Instead, I see loss in
performance. I also find that app is using more memory(about 12% more) as
compared to 1.1.

I've tested the app running locally and I had expected that locally
compiled/debug app to have full trust and run-time security checks to be zero.

I did performance analysis, and I noticed following:

- % time in Run-time checks is averaging 50% ( in 1.1 it was 0)
- Total run-time checks are about 6000+/sec( in 1.1 it was 0)
- % time in GC is less than 4% ( about same as 1.1)

Has anyone else experienced this? Apparently, there are not many posts out
there with this type of problem.

Please advise.

"KVin" <KVin (AT) discussions (DOT) microsoft.com> wrote:
I've worked with a number of applications that exactly match that
description, and never experienced the problem you're describing. I know
that's not of any help to you, but it does at least point the finger at your
application (which is fixable) and not the platform (which isn't).

The questions I have to ask:
- Which version of Visual Studio are you compiling with?
- Are you testing a Debug or a Release version? If it's release, do you have
"enable optimization" turned on?
- I'm assuming x86 on a Windows XP system. Are you running Vista? Is UAC
turned on?
- Are you by chance running a Debug/Checked build of the O/S?

--
Chris Mullins

I would also run FxCop against your code and look at security/performance
items, it may help you isolate the problems.


"Chris Mullins [MVP - C#]" <cmullins (AT) yahoo (DOT) com> wrote

"schneider" wrote:

2. I'm testing 'debug' version compiled by vs2005.
3. I'm running x86, windows XP.
4. What's debug/checked build of o/s?

Try using a Release build. There is a significant performance
difference in the Release vs. Debug versions on .NET 2.0.
We have seen only performance improvements when moving from 1.1 to
2.0, but alwyas compared Release versions.

Hi Patrick,

I tried Release version too. Sure, there's improvement, but not even close
to what I had in 1.1. Both Debug/Release version are compiled with 'optimize
code' checked.

I am at a loss as to why an app which runs great in 1.1 has problem on
conversion to 2.0. Obviously, I am missing something.

I would also run FxCop against your code and look at security/performance
items, it may help you isolate the problems.

Again, this is an easy way to check for a lot of know issues...


"KVin" <KVin (AT) discussions (DOT) microsoft.com> wrote