# Qihoo360/evpp

A modern C++ network library for developing high performance network services in TCP/UDP/HTTP protocols.

Repository: https://github.com/Qihoo360/evpp
Canonical: https://ross.abutalabs.com/products/evpp
Language: C++
License: BSD-3-Clause
License Family: permissive
Topics: network-library, libevent, high-performance, nonblocking, tcp-server, http-server, udp-server, async-functions, evpp, evnsq, evmc, cpp11
Last push: 2024-04-10T11:09:16+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3470, "days_push": 875, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3773, forks 952 (observed 2026-08-28T04:08:18.212458+00:00)

## What it is
evpp is a modern C++11 network library built on libevent for developing high-performance, nonblocking, multi-threaded TCP, UDP, and HTTP servers and clients. It also ships companion libraries evmc (async memcached client) and evnsq (async NSQ client), and is battle-tested in large-scale production.

## Use cases
- build a high-performance TCP server in C++
- write a nonblocking HTTP server or client
- implement a TCP long-connection gateway
- make async memcached requests from C++
- consume NSQ messages asynchronously in C++
- resolve DNS asynchronously in a network service
- build multi-threaded event-driven network services

## When to choose
- you need a modern C++11 interface over libevent for TCP/UDP/HTTP services
- you need multi-core, thread-safe, nonblocking networking with proven production scale
- you want async memcached or NSQ clients in C++

## When to avoid
- you need a full application framework with routing, serialization, or ORM features
- you prefer higher-level languages or async runtimes like Go or Rust
- you need a library with frequent recent development activity

## Facets
- artifact type: library
- maturity: maintenance
- function: http-server, http-client, websocket, concurrency, networking
- domain: backend, networking, developer-tools, microservices
- platform: windows, cpp, cross-platform
- tags: tcp-server, udp-server, libevent, nonblocking, event-driven, c++11, high-performance, evnsq, evmc, async-dns, linux, macos

## Member repositories
- Qihoo360/evpp (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:18.212458+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:27:51.528462+00:00, confidence not recorded.
  - readme: https://github.com/Qihoo360/evpp (fetched 2026-08-28T04:08:18.212458+00:00, sha 6c647d4e3212)
- Data as of 2026-08-30T08:39:29.467469+00:00.