MirrorNetworking/Mirror
This system is a comprehensive multiplayer networking framework for Unity, providing the core infrastructure for client-server communication, state synchronization, and transport layer abstraction. It enables developers to build multiplayer games by offering a suite of components for handling player authentication, object visibility management, and physics synchronization. The framework supports various networking strategies, including client-side prediction, lag compensation, and snapshot interpolation, while also providing extensive examples and utilities for testing and debugging networked applications.
63.4
Adequate · 5 August 2026
71k
lines of production code
C#
primary language
2
bus factor · 146 authors in all
3
measurements over time
How it got here
2018–2020 · Mirror networking library modernization
This period focused on modernizing the Mirror networking library through a comprehensive infrastructure overhaul, including the introduction of a new LAN discovery system, automated compiler symbol management, and a refactored, thread-safe code weaver. The team also expanded the example suite to demonstrate advanced features like additive scenes, multiple concurrent matches, and physics-based interactions, while significantly strengthening the test coverage and project documentation.
56 changes
2021–2023 · networking feature expansion and test coverage
This period focused on significantly expanding the Mirror networking library with new features, including advanced interest management strategies, multiple transport layer implementations (KCP, Edgegap, Telepathy), and client-side prediction systems. Concurrently, the project underwent major architectural improvements, such as the ILPostProcessor migration and core refactoring, while establishing comprehensive unit test coverage across the entire codebase.
99 changes
2024–2026 · Example expansion and security features
This period focused on significantly expanding the library of example scenes and assets, including new implementations for top-down shooters, tank controls, and physics-based movement. Concurrently, the project introduced a new encryption transport for secure networking and added profiling tools for performance monitoring.
37 changes
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About this page
- The description of this project is derived from its own commit history, not from its README.
- The score is its highest published measurement, taken on 5 August 2026 at a pinned commit. It is not a live figure and does not change until the project is measured again.
- Measured at commit 35b8fd7816 — the exact code this score is about.
- Scored under rubric rubric-2026.08.19. Score the same commit under that rubric and you get the same number.