High Performance GitHub Repositories (2026) · Open Source Tools

Linear optimization software

A high-performance, zero-overhead, extensible Python compiler with built-in NumPy support

Event-driven network application framework for high performance protocol servers & clients, non-blocking.

Cista is a simple, high-performance, zero-copy C++ serialization & reflection library.

🔘 Minimalistic and High-performance goroutine worker pool written in Go

High Performance Software-Defined Block Storage for container, cloud and virtualisation. Fully integrated with Docker, Kubernetes, Openstack, Proxmox etc.

High performance JVM JSON library

Zero-allocation hashing for Java

High Performance ServiceMesh Data Plane Based on eBPF and Programmable Kernel

The fastest Direct2D-powered image viewer for Windows. Features multi-threaded JXL/AVIF decoding, GPU acceleration, and a borderless geek UI. Supports WebP, RAW, & QOI with visual settings and auto-updates. Portable & SIMD-optimized.

A modern, fast, lightweight thread pool library based on C++2x

A lightweight, fast and reliable tun2socks for Android

[Go]Distributed Actor/Grain framework for Golang with goodies

A high performance component oriented take on ECS that supports sparse sets and archetypes seamlessly.

A high-performance distributed in-memory object cache system built from scratch in C++17, compatible with Redis protocol.

High-performance configuration management framework for Go applications with zero-allocation performance, universal format support (JSON, YAML, TOML, HCL, INI, Properties), and an ultra-fast CLI powered by Orpheus.

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

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

:sparkles: A Java library for applications software infrastructure

Very Simple HTTP Server that can deliver static files very fast.