Cysharp

Cysharp/UniTask

Provides an efficient async/await integration to Unity.

Cysharp/ZLinq

Zero-allocation LINQ implementation providing high-performance query operations on collections, spans, and tree structures without garbage collection overhead. Offers 99% compatibility with .NET 10 LINQ including new operators, struct-based enumerables, SIMD optimization, and tree traversal support for FileSystem, JSON, and GameObjects—enabling production-ready data processing for performance-critical game code.

Cysharp/MemoryPack

Zero encoding extreme performance binary serializer for C#.

Cysharp/MagicOnion

Unified Realtime/API framework for .NET platform and Unity.

Cysharp/R3

R3 is a modern Reactive Extensions library for Unity that enables efficient in-memory event-driven programming with LINQ-style composition. Built on over a decade of Rx experience, it prioritizes game engine needs through frame-based operations, zero-allocation designs, and superior performance compared to traditional Rx implementations, while supporting async/await patterns and preventing subscription leaks.

Cysharp/ZString

Zero Allocation StringBuilder for .NET Core and Unity.

Cysharp/MasterMemory

Embedded Typed Readonly In-Memory Document Database for .NET Core and Unity.

Cysharp/MessagePipe

MessagePipe Interprocess Extension.

Cysharp/ZLogger

Zero-allocation structured logger for Unity built on Microsoft.Extensions.Logging. Leverages C# 10 string interpolation and source generators to output directly in UTF8 format, eliminating encoding overhead and boxing of values. Delivers exceptional performance for file, console, and network logging with minimal configuration required.

Cysharp/Ulid

Fast .NET C# Implementation of ULID for .NET Core and Unity.

Cysharp/csbindgen

Generate C# FFI from Rust for automatically brings native code and C native library to .NET and Unity.

Cysharp/YetAnotherHttpHandler

YetAnotherHttpHandler brings HTTP/2 support to Unity and .NET Standard through a drop-in HttpClient handler replacement. Built on Hyper and Rustls, it enables grpc-dotnet compatibility, efficient asset downloading, and multi-stream connections—all using the familiar HttpClient API. Supports Unity 2021.3+ across Windows, macOS, Linux, iOS, and Android platforms.

Cysharp/NativeMemoryArray

NativeMemoryArray provides native-memory backed arrays that bypass C#'s 2GB heap limit, enabling you to work with arbitrarily large datasets including 4K/8K video, deep learning models, and point cloud data. It offers Span/Memory slices, IBufferWriter support, and .NET 6 Scatter/Gather I/O integration for efficient streaming operations while reducing garbage collection pressure.

Cysharp/RuntimeUnitTestToolkit

CLI/GUI Frontend of Unity Test Runner to test on any platform.

Cysharp/CsprojModifier

Extension to perform additional processing when generating .csproj

Cysharp/SlnMerge

SlnMerge automatically merges Visual Studio solution files generated by Unity Editor, enabling better organization of projects into solution folders. Configure merge settings directly from the Unity Editor preferences or manually edit .mergesettings files. Compatible with Visual Studio 2022/2026 and JetBrains Rider 2025.x, supporting both legacy (.sln) and modern (.slnx) solution formats on Windows and macOS.