David Paoleschi sent over to me some quick tweaks when building a Citrix XenDesktop environment. Many of these optimizations specifically target XD environments that operate over WAN connections where latency might be an issue. Your Mileage may Vary. :)
Many of the settings were snagged from this Citrix Support DOC. I have also added some comments on the various settings when possible.
A very good document explaining many of these settings can be found here.
Optimization for WAN ICA settings
Edit the default.ica located under ‘C:\Inetpub\wwwroot\<Site Directory>\conf’ with the following additions:
Under [WFClient] add the following:
Disables LPT Port redirection
Disabled the Printing Virtual Channel associated with LPT redirection
Disables Client update functionality
This setting affects the max amount of server to client data that the connection will try and keep active at any point.
This setting affects the max amount of client to server data that the connection will try and keep active at any point.
This setting aligns with the underlying packet size for wireless networks. Citrix testing has found this value to be the optimum value for most networks.
Enabling the persistent cache decreases logon time and improves the performance of graphics operations during an ICA session
Enabling these parameters reduces the number of small mouse and keyboard packets sent to the server.
Intermediate mouse packets are discarded and a number of keystroke packets are coalesced into a single larger packet.
Enables Full Screen only mode.
Under [Application] add the following:
Enables Maximum Data Compression
These values enable SpeedScreen3 Latency reduction features.