dotnet-performance-patterns

Reduce memory allocations in .NET by using Span<T> and Memory<T> for memory slicing, ArrayPool<T> for buffer pooling, and stackalloc for stack memory, which minimizes garbage collection overhead and improves throughput.

Optimize string processing without GC pressure by replacing Substring calls with ReadOnlySpan<char> operations, enabling zero-allocation memory slicing for high-throughput data parsing.

Using readonly struct and ref struct improves .NET performance by enforcing stack-based memory management and preventing defensive copying, yielding performance gains and reducing heap allocations.

Yes, use ArrayPool<T> in .NET 8.0+ to rent and return buffers, significantly reducing memory pressure from frequent array allocations by reusing pooled arrays instead of creating new ones.

Making a class sealed improves method call performance in .NET by enabling JIT devirtualization, allowing the compiler to bypass virtual method table lookups and directly inline method calls.

Use stackalloc for small, localized memory allocations in .NET when you need stack-based memory management to completely avoid heap allocations and garbage collection overhead.