Is there Performance Penalty for multiple cross-assembly-calls?

[Peter Bär]

A Question to the C#/.Net Gods of this forum:
are there performance penalties when i compile (C#, FW1.1, ASP.NET,
Studio2003) a central baseclass in a different assembly than all the
derived classes?

f.i. ive got a class dbobject i project "Basesupport", compiles to
Basesupport.dll.
From dbobject i derive about 100 classes, thy all are located in Project
XYBiz, so they are compiled to XYBiz.dll.

doughter classes make heavy use of properties, methods and attributes from
the mother class (about 100 per method call)

Now, i dont know whether that design wouldnt produce a performance penalty
for jumping between user dlls, switching contexts, dlls, whatever.

Approximation one aspx page (resulting in 1 database call(storeproc-
SQLserver)) uses 5 objects, 3 methodcalls each, with - as i said, about 100
cross-assembly-calls. Summed up, thats about 1500 cross-assembly-calls.

Ok, i know, i know, "code is fast and db is slow, and therefor dont think
about performance, cause db is bottleneck anyways".

But i just wann aknow in principle whether there is no, just a tiny or
noticeable performance penalty from Framework & IIS, when they have to
ping-pong between two user-dlls 1500 times per page call...

Many thanks in advance &
cheers from Vienna

[Natty Gur]

Hi,

I don’t think that any difference will be between the calls. There will
be difference in the class loading but not in function calls. after the
assembly load to the caller space there wont be any difference between
calling class in the same assembly or other assembly calls).

Natty Gur, CTO
Dao2Com Ltd.
28th Baruch Hirsch st. Bnei-Brak
Israel , 51114

Phone Numbers:
Office: [phone]
Fax: [phone]
Mobile: [phone]

Know the overall picture
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[Yan-Hong Huang[MSFT]]

Hello Vienna,

Based on my experience, once the library is loaded by .NET framework, it resides in memory and there should not be
obvious performance penalty from it.

I am glad to recommend one good article to you.
"Performance Tips and Tricks in .NET Applications"
http://msdn.microsoft.com/library/en...asp?frame=true

I believe it could help you much in tuning your .net applications. Thanks.

Best regards,
Yanhong Huang
Microsoft Online Partner Support

Get Secure! - www.microsoft.com/security
This posting is provided "AS IS" with no warranties, and confers no rights.

--------------------
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!Subject: Is there Performance Penalty for multiple cross-assembly-calls?
!From: "Peter Bär" <[e-mail]>
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!X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet
!
!A Question to the C#/.Net Gods of this forum:
!
!
!are there performance penalties when i compile (C#, FW1.1, ASP.NET,
!Studio2003) a central baseclass in a different assembly than all the
!derived classes?
!
!f.i. ive got a class dbobject i project "Basesupport", compiles to
!Basesupport.dll.
!From dbobject i derive about 100 classes, thy all are located in Project
!XYBiz, so they are compiled to XYBiz.dll.
!
!doughter classes make heavy use of properties, methods and attributes from
!the mother class (about 100 per method call)
!
!Now, i dont know whether that design wouldnt produce a performance penalty
!for jumping between user dlls, switching contexts, dlls, whatever.
!
!Approximation one aspx page (resulting in 1 database call(storeproc-
!SQLserver)) uses 5 objects, 3 methodcalls each, with - as i said, about 100
!cross-assembly-calls. Summed up, thats about 1500 cross-assembly-calls.
!
!Ok, i know, i know, "code is fast and db is slow, and therefor dont think
!about performance, cause db is bottleneck anyways".
!
!But i just wann aknow in principle whether there is no, just a tiny or
!noticeable performance penalty from Framework & IIS, when they have to
!ping-pong between two user-dlls 1500 times per page call...
!
!Many thanks in advance &
!cheers from Vienna
!
!