I also had an issue with a slow IDE.
In my case I installed
- ReSharper
- Npgsql (low chance to cause the problem)
- Entity Framework Power Tools Beta 4
The following helped me a bit:
- Disabled synchronization - menu Tools → Options → Environment-Synchronized Settings
- Disabled plug-in selection - menu Tools → Studio → Options → Source Control.
- Disabled Entity Framework Power Tools Beta 4 - menu Tools → Extensions and Updates
Uninstalled JetBrain's Resharper - WOW!! I am fast again!!