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Turbocharged: Writing High-Performance C# and .NET Code - Steve Gordon - NDC Oslo 2024
Learn how to write high-performance C# and .NET code with proven techniques for optimizing memory usage, reducing allocations, and improving throughput in production.
- Always measure and benchmark performance before attempting optimizations to establish baselines and identify hot paths
-
Use
Span<T>for efficient, low-allocation processing of contiguous memory regions (strings, arrays, etc.) without creating copies - ArrayPool can help reduce allocations by reusing arrays instead of creating new ones for short-lived operations
- System.Text.Json provides better performance than Newtonsoft.Json with built-in support for modern APIs like Span<T>
- Focus optimization efforts on frequently called code paths that handle large amounts of data or have high throughput requirements
- Benchmark.NET is the preferred tool for accurate micro-benchmarking, providing detailed metrics about execution time and allocations
- Consider readability vs performance tradeoffs - highly optimized code can be more complex and harder to maintain
- Production monitoring and metrics are essential to validate that optimizations translate to real-world improvements
- Memory allocations can significantly impact performance through increased GC pressure, especially in high-throughput scenarios
- System.IO.Pipelines offers high-performance APIs for streaming scenarios with efficient buffer management