Skip to main content

Posts

Showing posts with the label zero allocation C#

C# Span Tutorial: Zero-Allocation Performance Guide

Tutorial: Zero-Allocation Performance Guide" style="width:100%;max-width:800px;border-radius:8px;margin-bottom:20px;" /> Learn C# Span and Memory with runnable examples, benchmarks, and best practices. Start writing zero-allocation, high-performance .NET code today. If you have ever profiled a hot code path in .NET and watched the garbage collector eat 30% of your CPU time, you already understand why C# Span<T> exists. Introduced in .NET Core 2.1 and now central to the entire BCL, Span<T> and its heap-friendly sibling Memory<T> let you slice, parse, and transform contiguous memory without allocating a single byte . This tutorial covers how both types work, when to use each, runnable benchmarks that prove the gains, and the pitfalls that trip up even senior developers. Why C# Span<T> Matters for Performance Optimization Most everyday C# code allocates far more than developers realise. Calling Substring , Split , ToArray , or Skip()...