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Lowering in C#: What's really going on in your code? 👾

If you're attending NDC you probably think you know what a foreach loop does - it iterates over a collection, right?

BUT do you know how? Do you know what the C# compiler does when you write a foreach loop? What about a lambda expression? Or the re-entrant magic that is a yield return statement

In this session we'll dive into Roslyn, the C# compiler, and learn about lowering and how it helps the compiler do its job, and what it does to your code. In the process you'll gain the skills to identify some of the common performance pitfalls of .NET, as well as just get a deeper understanding of what the code you write really does. 💎


[ YouTube ] : https://youtu.be/gc1AxbNybvw

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#CSharp #LowLevel #Compiler #Roslyn
@ProgrammingTip
🔍 Challenge: Create a compact Maze Game in C# under 2KB without .NET Runtime, Small enough to fit in a QR Code 🤔

👨‍💻 Process:
• Self-Contained: Includes all necessary components to run on any OS. ✔️

• Game Type: A graphical maze, utilizing Win32 APIs, avoiding WinForms. ⭐️

• Size Reduction Steps:
1- Initial Size: 64MB (with CoreCLR)
2- Post-Compression: 35.2MB
3- IL Trimming Applied: 10MB
4- Native AOT Compilation: 1.13MB
5- Removing Unused Features: 923KB
6- Using bflat Compiler: 882KB
7- bflat with Zerolib: 9KB
8- Direct PInvoke: 8KB
9- Eliminating Debugging and Relocations: 7KB
10- Targeting x86 Architecture: 6.5KB
11- Final Step with Crinkler Linker: 1,936 Bytes

🎉 Outcome: Achieved a C# game small enough to fit in a QR code!


[ Full Article 🔗 ] : https://migeel.sk/blog/2024/01/02/building-a-self-contained-game-in-csharp-under-2-kilobytes

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#CSharp #DotNet #Optimization #LowLevel
@ProgrammingTip
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