Entity Framework 6
Dapper
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Entity Framework 6 | Dapper | |
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2 | 9 | |
1,407 | 13,651 | |
0.3% | - | |
8.3 | 5.1 | |
7 days ago | about 3 years ago | |
C# | C# | |
MIT License | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Entity Framework 6
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ASP.NET Performance optimization question
Additionally, an individual context will also cache the actual sql being performed and their docs go over the caching it does here regarding that.
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Ask HN: What tangible benefits did you get from spending time on HN?
Every so often, posts from Bruce Dawson's blog get posted here - one such post was about using Event Tracing for Windows to diagnose an issue with an NTFS lock being held causing 63 cores to idle while 1 does all the work.
https://randomascii.wordpress.com/2019/10/20/63-cores-blocke...
A few months later, some other people in my team were struggling to diagnose an issue in production where a legacy webapp was struggling to scale up and fully use all 64 cores of the server we needed it to run on. I stepped in to help and remembered that post I'd seen on HN. We used ETW (through Windows Performance Recorder and Windows Performance Analyzer) to profile our app and I looked into the Wait Analysis. Turns out that Entity Framework 6 uses a ReaderWriterLockSlim to guard a cache, and that particular lock performs extremely poorly under heavy contention. Heavy in our case meant that for a single page build of one of this app's "hot path" pages, this lock would be taken a few hundred thousand times. We weren't the first to discover this:
https://github.com/dotnet/ef6/issues/1500
What some other people in my team were struggling with for about two weeks was resolved in a single day thanks to me goofing off and reading HN. (We ultimately used a fork of EF6 that didn't suffer from this issue to solve our problem)
Dapper
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Working with ListView in Windows Forms
Even those the old backend code to read from a database would work, the code was rewritten using Dapper. Had to add two column aliases in SQL SELECT statements and everything worked.
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Import data from a database with Dapper and SpreadsheetLight to Excel in C#
In this article learn how to create Excel spreadsheet documents from reading data from two SQL-Server table from a modified version of Microsoft NorthWind database using NuGet package Dapper and SpreadSheetLight to create and populate the spreadsheet files.
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Multiple Result Sets for SQL-Server (C#) including Dapper
Learn how to read reference table from SQL-Server using a single method. What is shown provides an efficient way to either use a connection, command objects to read data via a SqlDataReader for conventional work using methods from SqlClient and also Dapper which requires two lines of code to read data and one line of code to store data into list.
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BREAKING!! NPM package ‘ua-parser-js’ with more than 7M weekly download is compromised
https://www.nuget.org/packages/Newtonsoft.Json/ https://www.nuget.org/packages/AutoMapper/ https://www.nuget.org/packages/Dapper/ https://www.nuget.org/packages/FluentValidation/ https://www.nuget.org/packages/FluentAssertions/ https://www.nuget.org/packages/NUnit/ https://www.nuget.org/packages/xunit/ https://www.nuget.org/packages/YamlDotNet/ https://www.nuget.org/packages/Moq/ That is simply not true. Mature c# projects purposely maintain no downstream dependencies and is they do, it's to a major reputable lib. See for yourself - these are staple third party packages commonly used. Anything dependency starting with System or NETStandard is Microsoft maintained.
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How to Build a Blazor CRUD Application with Dapper
In this blog post, we are going to discuss how to bind the Syncfusion Blazor DataGrid with a database using Dapper and perform CRUD operations. To demonstrate this, we are going to create a bug tracker database table in MS SQL Server and perform CRUD operations in that table in a Blazor server-side application.
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A couple of questions about dotnet from a Java developer :)
Entity Framework Core StackExchange/Dapper
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Requests per second 12 requests per second – Realistic Python web frameworks
Like there wouldn't be anything in between /s
There are "simple ORMs" that only map results of SQL queries to objects. They do not provide a magic query API - which is the source of most problems. I don't do Python, but for .NET there is Dapper https://github.com/StackExchange/Dapper, you can have a look what I mean. You write the SQL query, explicitly execute it, the library maps the results of that query into objects (it's C#, so you have to declare the class. In Python I'd imagine it would create the object for you)
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Why would I even bother using Dapper?
To add some differences: EF tracks object state in an instance of a context, Dapper does not. Dapper is strictly for object mapping (taking the output of a query and mapping it onto an object). This makes Dapper far easier to implement, versus EF’s DbContext configuration. Due to the lack of tracking and slimmer wrapping, it’s also faster. Things get really great when you have multiple complex objects and multiple result sets. It takes a lot of boring boilerplate code out of your code.
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Plans for Entity Framework Core 6.0 revealed as Microsoft admits it is unlikely to match Dapper for performance
Just take a look at this Dapper 2.0 feature that's been festering for months years.
What are some alternatives?
PetaPoco - Official PetaPoco, A tiny ORM-ish thing for your POCO's
LINQ to DB - Linq to database provider.
NHibernate - NHibernate Object Relational Mapper
ServiceStack.OrmLite - Fast, Simple, Typed ORM for .NET
Entity Framework - EF Core is a modern object-database mapper for .NET. It supports LINQ queries, change tracking, updates, and schema migrations.
MockQueryable - Mocking Entity Framework Core operations such ToListAsync, FirstOrDefaultAsync etc
MongoDB Repository pattern implementation
NPoco - Simple microORM that maps the results of a query onto a POCO object. Project based on Schotime's branch of PetaPoco
FluentMigrator - Fluent migrations framework for .NET