Memory Management using Span<T> and Memory<T> for High-Performance Applications | Community Feed

C#‘s garbage collector handles most memory work, but large datasets, real-time processing, and low-latency systems still suffer from unnecessary allocations. This guide explains how Span<T> and Memory<T> let you work with contiguous memory efficiently — often with zero copies.

What you’ll learn

The problems these types solve versus copying arrays, unsafe code, and temporary buffers
Why Span<T> is a stack-only ref struct ideal for synchronous, allocation-free work — and why Memory<T> is the heap-compatible, async-friendly alternative
Real-world examples: high-performance CSV parsing, zero-copy JSON reading with Utf8JsonReader, binary file parsing, and async network packet processing
Performance benchmarks comparing string.Split(), Span<T> slicing, Array.Copy, and Memory<T>
Best practices including stackalloc for small buffers, and the pitfalls to avoid (like storing Span<T> in fields or using it in async methods)

Essential reading if you want to squeeze more speed out of your C# hot paths.