Performance GitHub Repositories (2026) · Open Source Tools

Free Windows, Mac and Linux cleaner, scanner, and more.

Open-source Windows game resource manager. Suppresses background processes, gives games exclusive CPU cores, steers device interrupts off game cores, applies per-game GPU driver, memory and power policies, and restores every change after play. No injection, no telemetry. GPL-3.0.

A free, powerful, multi-purpose tool that helps you monitor system resources, debug software and detect malware. Brought to you by Winsider Seminars & Solutions, Inc. @ https://windows-internals.com

Gin is a high-performance HTTP web framework written in Go. It provides a Martini-like API but with significantly better performance—up to 40 times faster—thanks to httprouter. Gin is designed for building REST APIs, web applications, and microservices.

A modern load testing tool, using Go and JavaScript

A declarative, efficient, and flexible JavaScript library for building user interfaces.

Android DEX → Java decompiler in Rust, built for speed — full apps in seconds, queries in milliseconds. Progressive analysis, javac-verified output, every DEX version, multi-dex & XAPK/APKS/APKM containers.

Path tracing renderer and utilities for three.js built on top of three-mesh-bvh.

A systematic modern C++ tutorial covering C++11-C++23, STL, concurrency, performance optimization, software engineering, embedded systems, networking, GUI, and real-world project practices.

Nuitka is a Python compiler written in Python. It's fully compatible with Python 2.6, 2.7, 3.4-3.14. You feed it your Python app, it does a lot of clever things, and spits out an executable or extension module.

A modern formatting library

An open-source protocol enabling high-performance, local-first, peer-to-peer, end-to-end encrypted collaborative apps.

Open Machine Learning Compiler Framework

Apache JMeter open-source load testing tool for analyzing and measuring the performance of a variety of services

A streamlined and customizable framework for efficient large model (LLM, VLM, AIGC) evaluation and performance benchmarking.

Rust profiler for CPU, memory, SQL, HTTP, and async performance, with Prometheus and Grafana support.

A fast minimal dependency implementation of Apache Parquet

The website QA tool for your coding agent. 310+ audit rules across SEO, performance, security, accessibility and agent experience.

CodSpeed is the all-in-one performance testing toolkit. Optimize code performance and catch regressions early.

Brotli compression library for Go (RFC 7932), pure Go, no cgo, encoder + decoder, highly optimized