This is the first report for such a problem, so I will have to ask you a few additional questions in order to narrow down the possible causes of the issue.
OpenAccess integrates in Visual Studio using an add-in and a VS package. The add-in is mainly used to include the OpenAccess menu within the main Telerik menu and in the project context menu. The package on the other hand provides the visual designer, its wizards and all project and item templates. It also loads additional commands in some of the menus. You said that disabling the add-in has no apparent effect on this behavior, so most likely the problem is in one of the package commands.
The package provides only one command to the project's context menu - the one for running the Add OpenAccess Service wizard
, so this is the first thing you could try disabling. Close Visual Studio, open the C:\Program Files (x86)\Telerik\OpenAccess ORM\dsl2010\Extensibility
directory, cut and move the Dsw folder out of Extensibility. Start Visual Studio and test if the context menu is still slow. This will completely disable the AOS wizard but you could always get it back by returning the Dsw folder to its original place.
Besides the test above, please also check if the menu opens slowly on any kind of an item in Solution Explorer or only on some types - solution, project, folder, code file, etc. It would be helpful if you could also describe the type and the structure of your big project - how many files and folders it contains, so we could try similar setup on our side and hopefully be able to reproduce the slow-down.
Thank you in advance for your assistance and please excuse us for the inconvenience caused.
the Telerik team
Q3'12 SP1 of OpenAccess ORM packs Multi-Table Entities mapping support. Check it out.