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I want to optimized my queries in Entity Framework 6.1.3, so I need to know that whether queries are already CompiledQueries or I need to write them manually as CompiledQuery?
Thanks in advance.
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A compiled query is an object that keeps a prepared SQL statement and a delegate to a materializing function. The first one is to be executed at the server to get rows related to the query, the second one transforms a result set into a sequence of entity objects.
Entity Framework Core uses Language-Integrated Query (LINQ) to query data from the database. LINQ allows you to use C# (or your . NET language of choice) to write strongly typed queries. It uses your derived context and entity classes to reference database objects.
Entity Framework has the following forms of caching built-in: Object caching – the ObjectStateManager built into an ObjectContext instance keeps track in memory of the objects that have been retrieved using that instance. This is also known as first-level cache.
Use the DbSet. SqlQuery() method to write raw SQL queries which return entity instances. The resulted entities will be tracked by the context, as if they were returned by the LINQ query.
No, they are not. You'll need to specify that you want to use a CompiledQuery.
That said, using a compiled query will only provide a 7% performance improvement. If tuning performance of EF really is a major issue for you, I recommend reading the following:
https://msdn.microsoft.com/en-us/data/hh949853
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