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AppV - Application (.NET) is slower when sequenced

I've recently sequenced an application (Morello Smart Client). This application requires .NET 2.0 SP1 and will be deployed on a citrix farm.

I sequenced the application on a machine with .NET 2.0 SP1 preinstalled. Also, my Citrix servers have .Net 2.0 SP1. Application appears to work fine.

When multiple users use the app however, some functions become really slow. Users have to wait minutes on actions that would take seconds normally.

After a day of troubleshooting we found the problem is with AppV. When we install the application directly on the citrix server all works fine and fast (also with multiple users).

I looked in the package to see if the app uses many virtualised directories, but it doesn't (except some .ico files). Same behaviour when only using RDP (not citrix).
What could be the cause of this behaviour? Any ideas would be appreciated.

We use the following environments:
MS Application Virtualisation 4.5
Citrix XenApp 4.5 on Windows 2003 Ent.
I also contact the supportdesk of the app but thay are of little help.
1 Solution
Hi There,

In order to understand the speed difference you need to understand the application at a deeper level to appreciate the issue.

In general capturing the activity of the application installed natively on one machine, and also when virtualised on another - compare and contrast. A common tool for this is process monitor. It is verbose but it does not lie.

You will need to interpret the results in the context of the application.

In a recent experience, I found that a .NET application slowed down when the host .NET version was .NET2SP1, whereas .NET2 RTM was very close to native performance. Process monitor enabled me to see a very large amount of entries called 'Fusion'. This is a .NET logging facility - which was left on by the devs. Removing the appropriate reg key during sequencing resolved the issue.
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