[SOLVED, Manual action required] Performance issue in Umbraco 9-10 when using ContentModel (or ModelsBuilder models) in custom controllers.
If you are using custom controllers with ContentModel or ModelsBuilder models you will experience massive performance issues as your projects scales. This issue is tied to how ASP.NET Core performs validation on object graphs and a fix for this will be shipped but not until v11 as this is a breaking change!…