为每个页面使用不同的DbContext类的好习惯？

I am in the process of optimizing and refactoring a large ERP-type ASP.NET application to achieve a faster development experience. We currently have a large model (600+ tables/entities) that is created when the application starts which take around 15 seconds. (At this point, we are using NHibernate with code-first mappings)I am in the process of optimizing and refactori