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A comprehensive open-source reference for backend engineering HTTP, concurrency, gRPC, distributed systems, observability, and cloud-native deployment. Built from first principles.

🚀 Coroutine-based concurrency library for PHP

Grok 批量注册 (Camoufox) + 实时 Web 监控面板 | Batch Grok registration engine with live panel — concurrency · ASN blacklist · proxy pool · token auth

Virtual-thread based safe concurrency & streaming

Red is a next-generation programming language strongly inspired by Rebol, but with a broader field of usage thanks to its native-code compiler, from system programming to high-level scripting and cross-platform reactive GUI, while providing modern support for concurrency, all in a zero-install, zero-config, single ~1MB file!

The C++ Standard Library for Parallelism and Concurrency

A queue with custom concurrency and time limit.

A non-blocking concurrency framework for PHP applications. 🐘

Concurrency primitives, safe memory reclamation mechanisms and non-blocking (including lock-free) data structures designed to aid in the research, design and implementation of high performance concurrent systems developed in C99+.

Cocoa Concurrency Things.

[mirror] concurrency primitives

The libdispatch Project, (a.k.a. Grand Central Dispatch), for concurrency on multicore hardware

Promise queue with concurrency control

Trio – a friendly Python library for async concurrency and I/O

A small Java 8 library (string manipulation, BiStream, Structured Concurrency, SQL Templates)

A distributed, fault-tolerant, high-concurrency backend framework with continuation-based web programming and a remote retry ring, built on Chez Scheme.

🔥 Java enterprise application development framework for full scenario: Restrained, Efficient, Open, Ecologicalll!!! 700% higher concurrency 50% memory savings Startup is 10 times faster. Packing 90% smaller; Compatible with java8 ~ java26; Supports LTS. (Replaceable spring)

High level asynchronous concurrency and networking framework that works on top of either Trio or asyncio

Ignareo the Carillon, a web crawler/spider template of ultimate high concurrency built for leprechauns. Carillons as the best web spiders; Long live the golden years of leprechauns! (ISML=international saimoe; 2022 ISML is last ISML)

Structured concurrency and effects for JavaScript

Lock-free rate limiter for Java 8+: token bucket, leaky bucket, sliding window, fixed window, warm-up and a concurrency bulkhead. 无锁限流库：六种算法，单 jar 零依赖。

🚀🚀A high-performance and high-concurrency ssh tool written in Go. It is 10 times faster than Ansible. If you need much more performance and better ease of use, you will love it.

Starknet full node designed for peak concurrency and efficiency

Edit images and video with Swift concurrency, powered by Metal.

Better structured concurrency for go

Useful, testable Swift concurrency.

A comprehensive and efficient low-contention thread pool for easily managing both sync and async workloads. It provides granular work control, flexible concurrency, and robust error handling.

Practical solutions to problems with Swift Concurrency

A controlled concurrency testing framework for the JVM

Enterprise-grade modular framework for Minecraft server development with multi-tier caching, Redis Streams, resilient data processing, and modern Java concurrency. Built on Fairy Framework for production-scale plugin development.