type-design-performance

What problem does it solve?

This Skill helps developers make informed decisions about designing .NET types to maximize performance, reduce memory allocations, and improve API efficiency.

Core Features & Use Cases

• Struct vs. Class Decisions: Provides a matrix and guidelines for choosing the right type category.
• Immutability Patterns: Emphasizes readonly struct and record types for predictable behavior.
• Collection Optimization: Guides selection of efficient collection types like FrozenDictionary and proper enumeration strategies.
• Use Case: When designing a new data transfer object (DTO) or a performance-critical utility class, use this Skill to ensure you're choosing the most efficient type (e.g., record struct vs. record class, Span<T> vs. Memory<T>).

Quick Start

Use the type-design-performance skill to decide whether to use a struct or class for a new data type.