Entity Framework edmx click on diagram very slow

Question

Background first: I have a database-first EF6 model in Visual Studio 2015 (latest nuget 6.1.3 pointing to a local SQL Server 2014 SP1 Express database) on a Windows 10 Pro lapto

Answer 1

This is an issue with Microsoft.VisualStudio.Modeling.Sdk on Windows 10 and also affects the LINQ to SQL (DBML) designer. The team that owns the VS Modeling SDK is currently working on this. We have an issue tracking it on the EF project site https://entityframework.codeplex.com/workitem/2861. We will keep that issue updated with progress, availability of a fix, workarounds, etc.