MemoryPack

# MemoryPack

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> [!IMPORTANT]
> MemoryPack is a high-performance serialization format for **trusted data only**: data produced and consumed by code you control, over channels you trust. With the recent rise in security issues found through AI-assisted vulnerability discovery, we no longer recommend using MemoryPack where the input can come from an untrusted party, such as public network endpoints or user-supplied files. For those scenarios use [MessagePack for C# v4](https://github.com/MessagePack-CSharp/MessagePack-CSharp/releases/tag/v4.0.0-preview.1), which is designed to be secure by default and now performs has closed much of the performance gap. The features aimed at cross-boundary communication (the TypeScript code generator among them) will be removed in the next MemoryPack release, so please avoid depending on them.

Zero encoding extreme performance binary serializer for C# and Unity.

![image](https://user-images.githubusercontent.com/46207/200979655-63ed38ae-dad2-4ca0-bbb7-9e0aa98914af.png)

> Compared with [System.Text.Json](https://learn.microsoft.com/ja-jp/dotnet/api/system.text.json), [protobuf-net](https://github.com/protobuf-net/protobuf-net), [MessagePack for C#](https://github.com/neuecc/MessagePack-CSharp), [Orleans.Serialization](https://github.com/dotnet/orleans/). Measured by .NET 7 / Ryzen 9 5950X machine. These serializers have `IBufferWriter<byte>` method, serialized using `ArrayBufferWriter<byte>` and reused to avoid measure buffer copy. 

For standard objects, MemoryPack is x10 faster and x2 ~ x5 faster than other binary serializers. For struct array, MemoryPack is even more powerful, with speeds up to x50 ~ x200 greater than other serializers.

MemoryPack is my 4th serializer, previously I've created well known serializers, ~~[ZeroFormatter](https://github.com/neuecc/ZeroFormatter)~~, ~~[Utf8Json](https://github.com/neuecc/Utf8Json)~~, [MessagePack for C#](https://github.com/neuecc/MessagePack-CSharp). The reason for MemoryPack's speed is due to its C#-specific, C#-optimized binary format and a well tuned implementation based on my past experience. It is also a completely new design utilizing .NET 7 and C# 11 and the Incremental Source Generator (.NET Standard 2.1 (.NET 5, 6) and there is also Unity support).

Other serializers perform many encoding operations such as VarInt encoding, tag, string, etc. MemoryPack format uses a zero-encoding design that copies as much C# memory as possible. Zero-encoding is similar to FlatBuffers, but it doesn't need a special type, MemoryPack's serialization target is POCO.

Other than performance, MemoryPack has these features