1/1/2024 0 Comments Ef core sqlite tutorialSome recommend using an object oriented DB or micro ORM.I plan to update this post when I make the change Nobody will ever query less than aĭay worth of them. In the first article, I included a SQLite database within the container. In the past two articles, I’ve walked you through building a small ASP.NET Core API using Entity Framework encapsulated in a Docker container. Instance in my usecase I've got some measurements that are being EF Core in a Docker Containerized App, Part 3. Retrieving fewer larger records you could improve performance. Overhead associated with retrieving many individual records. In less than 5 minutes you will have a ready-to-use data access layer for your business objects. In many cases you can combine many records together to reduce LINQ to SQLite Tutorial This tutorial guides you through the process of creating a simple application powered by LinqConnect technology.You cannot use structures inside LinQ queries, so that's not an.I found that in my case using Tuples instead of anonymous types improves performance a little, the following query executed roughly 30% faster: var query = db.DataPoints.Select(dp => Tuple.Create(dp.sensorID, dp.TimeStamp, dp.Value)) This operations takes 1.2 seconds compared to 18 seconds for normally retrieving the same amount of data. var query = db.DataPoints.Select(dp => new ) We can use anonymous objects for convenience. 3 minutes to read 13 contributors Feedback In this article The model Querying Saving data EF O/RM considerations Next steps Entity Framework (EF) Core is a lightweight, extensible, open source and cross-platform version of the popular Entity Framework data access technology. Entity framework won't create the entities it normally would, and the operation runs much faster. Select and uninstall the following packages. Remove SqlServer Packages While still in the Manage NuGet Packages screen click on the Installedtab. We can create new objects right inside the LINQ query. Select Browse and in the search box enter and install the two packages that are found. Of-course most of the time we need more than just an array of primitives This query took 0.4 seconds, compared to 18 seconds for the original query. This bypasses all of entity creation normally performed by entity framework. List dataPoints = _db.DataPoints.Select(dp => dp.Value).ToList() Many of the options you can set via pragma statements. Load just one property, then you get a list of primitives. You have to use the Microsoft supplied provider with EF Core, and it only supports a small subset of the connection string options in. If we do not intend to modify the data, there is a lot we can do. The database can handle that, but the entity framework seem to struggle setting up all those entities, change tracking, etc. We are loading just a megabyte of data from disk, the cause of poor performance is that the data is split across 40,000 tiny entities. Is it unavoidable for this operation to take this long? Most answers follow the common wisdom of loading less data, but in some circumstances such as here you Absolutely Positively Must load a lot of entities.
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