Memory and Performance in C#

Memory and Performance in C#

Every page here is directly about reducing allocations or working closer to memory and references.

Feature	Introduced In	Why it belongs here	Guide
Span<T>	C# 7.2	Allocation-free slices over contiguous memory.	Guide
Implicit Span and ReadOnlySpan conversions	C# 14.0	Reduces friction when passing arrays and spans to span-first APIs.	Guide
ref struct	C# 7.2	Stack-only type foundation for Span<T>.	Guide
ref locals	C# 7.0	Alias storage locations without copying values.	Guide
ref returns	C# 7.0	Return references instead of copied values.	Guide
readonly struct	C# 7.2	Prevent defensive copies for immutable value types.	Guide
Generic math	C# 11.0	Zero-boxing numeric abstractions via static interfaces.	Guide