Checklist for ICA Session slowness issues

Networking Layer
1. Is the session slowness observed in a TCP-based ICA connection, or a UDP-based ICA connection, or both?
2. When the slowness is on-going, does Connection Strength Indicator in Workspace App toolbar show a sign of low connection quality, high latency etc.?

Protocol Layer
3. Can the session slowness be when using RDP protocol to establish a connection between the affected VDI and client endpoint 

Application Layer
4. Is the session slowness observed when operating on a classic application, or a UWP application running in the session? 
5. Is the session slowness observed when operating on a specific application, or any applications (like notepad, command prompt) running in the session?
6. Take a screen recording inside the VDI containing the issue reproduce. Is the session slowness observed in the screen recording video?

"ICA Session slowness" refers to a slow interaction between end user's operations and visual responsiveness by Citrix VDI. When reporting such issues to Citrix Support, it is recommended to follow the checklist in this article to gather the necessary context, which would significantly help Citrix Support in the issue triage and problem resolution.