debug output window is very slow

[Todd C. Gleason]

I am running a mixed-mode set of projects under Visual
Studio .NET 2003 (7.1.3088, .NET 1.1.4322):

MFC-based C++ GUI
C# DLLs
Managed C++ DLLs

For some reason, the debugger's output window causes a
huge amount of slowdown. Either using the MFC TRACE
macro, or Debug.WriteLine, it is quite slow. I get maybe
10 lines max written out in a single second. I even
tried writing lines in a tight loop, and it was
definitely slowing down for just the output window. This
performance is probably 10% of what VC++ 6.0 had.

It doesn't eat up the CPU, either. I looked in the task
manager and it's being slow at a mere 10% CPU or so. I
removed the TRACE statements and my code executes like
lightning (proving that, hey, managed code runs fast).

Still, I'd like to have my trace output back. I talked
to a coworker, who is working on pure C# (totally
different code base, using the 2002 edition), and she
thinks she may be experiencing similar problems.

I haven't noticed any posts about this problem--can
anyone confirm?

[Will Dean]

Post by Todd C. Gleason
I haven't noticed any posts about this problem--can
anyone confirm?

Yup, it's incredibly slow in both 2002 and 2003. It can sometimes
buffer huge amounts of data, slowly writing it out to the window - this
can take an age to finish after the application is stopped.

If you can run without attaching the debugger, dbmon or DebugView are
both better at recording the ODS info.

Will