How to optimize this entity framework code

Question

I'm fetching movie meta data from and API and adding them to database using entity framework using the following code

This code this taking upto 20% CPU when called for one movie. I'm using one context for one insert. Add() and DBSet.Local.Where(..) methods are the most expensive here. How can I optimize the code to reduce CPU.

Update: On code profiling I found DBSet.Local.Where(..) is where the CPU is eating up. My reason to call DBSet.Local.Where is to find out if I've already added that object (person) so that I don't re-add it. Thoughts?

Answer 1

This Movies.Where(My => My.ID == Movie.Id).FirstOrDefault() can be optimize by calling Movies.Find(Movie.Id) .

Finds an entity with the given primary key values. If an entity with the given primary key values exists in the context, then it is returned immediately without making a request to the store. https://msdn.microsoft.com/en-us/library/gg696418(v=vs.113).aspx

I don't see any optimizations for the Add()