Entity framework Slow query performance

Question

I am using Entity framework 6.2.0 with WebAPI hosted on azure app service.

My database is not big with only two tables and I have a simple select query

Account account =  Db.Accounts.Where(p => p.Code == Code && p.PersonId == 
PersonId).Include("Options").FirstOrDefaultAsync();

What i am struggling with is, when I deploy this on azure. and whenever i make the first call to the api which uses above query or when there is a significant gap of few minutes or 1 hour between two calls, Above process takes a long time to complete .almost 20-25 seconds, The next call is in less than a second.

I have confirmed, that it's definitely not my network latency or something else that is slowing this down.

Does anyone have a clue what I can look at?

My entity framework implementation is database-first.

Answer 1

I think this might be usefull for you:
EF warm up:
How to "warm-up" Entity Framework? When does it get "cold"?
https://www.fusonic.net/en/blog/3-steps-for-fast-entityframework-6.1-code-first-startup-performance/

IIS idle timeout Fixing slow initial load for IIS