Top PERFORMANCE GitHub Repositories & Tools (2026)

The next-generation Minecraft: Bedrock Edition server software aims to be reliable, fast and feature-rich 🌟

:gem: Feel++: Finite Element Embedded Language and Library in C++

Official Autoptimize repo on Github

DivineMC is a multi-functional fork of Purpur, which focuses on the flexibility of your server and its optimization.

The website QA tool for your coding agent. 295+ audit rules across SEO, performance, security, accessibility and agent experience.

A modern, mostly zero-allocation C++23 library for working with low-level Windows within user-space. Iteration over loaded modules via PEB, EAT iteration, lazy imports, syscalls, and more.

A view for display markdown text.support markdown streaming like gpt&claude&gemini&deepseek

🚦 Generate badges (shields.io) based on Lighthouse performance.

Laravel SmartCache - Optimize Caching for Large Data

🟥 AppSignal for Ruby gem

Compiler for multiple programming models (SYCL, C++ standard parallelism, HIP/CUDA) for CPUs and GPUs from all vendors: The independent, community-driven compiler for C++-based heterogeneous programming models. Lets applications adapt themselves to all the hardware in the system - even at runtime!

A simple system monitoring and alerting tool to monitor server HW stats.

Open-source performance diagnostics for PyTorch training runs.

Fast and exact implementation of the C++ from_chars functions for number types: 4x to 10x faster than strtod, part of GCC 12, MySQL, DuckDB, Chromium, Redis and WebKit/Safari

Zerocopy makes zero-cost memory manipulation effortless. We write `unsafe` so you don’t have to.

BioDynaMo is a high-performance and modular, agent-based simulation platform.

A simple and powerful entity component system (ECS) written in C++17

:sparkles: A Java library for applications software infrastructure

🩺⚡ Runtime Doctrine ORM analysis integrated into Symfony Web Profiler. Detect N+1 queries, security vulnerabilities, and performance issues during query execution.

LeilFS is a free-and open source, distributed POSIX file system inspired by Google File System.