BadOptimizations vs Krypton

BadOptimizations is a free Minecraft mod aimed at client-side frame-rate performance. It uses a multi-loader setup and lists compatibility with Minecraft 1.21.6, 1.21.7 and 26.2. The mod runs on the game client, so its stated performance focus concerns the player’s local installation rather than server operation. Dedicated server support is not provided. Sodium is not required, leaving it independent of that particular mod dependency. The project is distributed through its Modrinth website and has a free plan. Its multi-loader designation is relevant for players whose installations use different supported loader environments. Before installing, players need to match the mod to one of the listed Minecraft versions and to their chosen loader. Server administrators should distinguish this client scope from server-side tools, since the entry lists no dedicated-server capability. BadOptimizations is therefore a client performance option for compatible Minecraft releases, with version and loader compatibility forming the main setup considerations.

Krypton is a free Fabric mod that optimizes Minecraft networking and entity tracking, with its performance work directed mainly at servers. It works on both clients and servers, including dedicated servers. Its network handlers are based on optimized Netty handlers from the Velocity proxy, using native code where appropriate. Flush consolidation is intended to reduce server CPU use and tick times and lessen the impact of speculative-execution hardware vulnerabilities. Other small optimizations target memory use and packet serialization speed. Krypton is tuned for Linux, though it should work wherever Minecraft can run. CurseForge lists Fabric and Quilt as supported loaders. The project aims to work with Fabric API, Lithium, and Sodium; compatibility with other mods is best effort. It is licensed under LGPL-3.0-only, and the maker does not guarantee stability, compatibility, or support for every setup. The project is described as feature-stable, while updates for newer Minecraft versions depend on the maker's availability and need. Listed compatibility includes Minecraft Java Edition versions 1.16.2 through 1.16.5, 1.17.x, 1.18.1 through 1.18.2, 1.19.x, 1.20.x, 1.21.x, and 26.1 through 26.3.