Entity Framework Core. Performance issues?

Question

C++ / C#

For the sake of interest, I began to transfer my old project to the new ASP .Net Core platform.
In addition to the new version of ASP MVC, an updated version of the Entity Framework has been released. Actually about her and the question. A query that took 5-6 ms in EF 6, takes 700-800 ms on the new version of ORM. Has anyone else encountered a similar problem? Is the new version of EF really that bad?
linq query example
pastebin.com/QBeu3ync

Answer 1

It's still a raw platform, and of course it has - and +
I think using ef - it makes no sense, and probably won't (yet),
so wait for other ORMs
, there will be a mongo provider soon, while it's only for rc1, I hope it will come out full-fledged.
there is an nhibernate provider, which is also due soon,
there is also dapper, etc...
stay tuned...

Answer 2

If there is any problem with EF, then I look here if it has already been posted.
EF is still changing and being corrected, there are many problems in it.