Cysharp/MemoryPack

Health v2 · maintenance only

Adoption not part of the score

4708 stars · 312 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

MemoryPack is a zero-encoding, extremely fast binary serializer for C# and Unity, using a C#-optimized format that copies memory directly instead of encoding. It supports source-generator-based codegen, version tolerance, polymorphism, circular references, and TypeScript code generation.

Use cases

• serialize C# objects to binary faster than MessagePack or protobuf
• high-performance serialization for Unity IL2CPP games
• serialize struct arrays with minimal overhead
• AOT-friendly serialization without reflection or IL emit
• version-tolerant binary serialization of POCOs
• generate TypeScript definitions from C# types
• streaming serialization with PipeWriter/PipeReader

When to choose

• you need maximum serialization throughput in .NET or Unity
• you want Native AOT / IL2CPP compatible serialization via source generators
• you serialize large arrays of structs
• you want a C#-specific binary format without schema encoding overhead

When to avoid

• you need cross-language interoperability with a standard format like JSON, Protobuf, or MessagePack
• you need full schema evolution across many versions
• your target is below .NET Standard 2.1
• you need human-readable serialization

Facets

library · maturity active

serialization developer-tools backend cross-platform game-engine dotnet binary-serializer unity source-generator zero-encoding poco aot-friendly game-development c#

Member repositories

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