# tornadoweb/tornado

Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed.

Repository: https://github.com/tornadoweb/tornado
Canonical: https://ross.abutalabs.com/products/tornado
Homepage: http://www.tornadoweb.org/
Language: Python
License: Apache-2.0
License Family: permissive
Topics: python, asynchronous
Last push: 2026-08-24T19:01:07+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 6202, "days_push": 9, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 22181, forks 5550 (observed 2026-08-28T04:11:32.415820+00:00)

## What it is
Tornado is a Python web framework and asynchronous networking library originally developed at FriendFeed. It uses non-blocking network I/O to scale to tens of thousands of open connections, making it well suited for WebSockets, long polling, and other long-lived-connection applications.

## Use cases
- build a websocket server in python
- handle tens of thousands of concurrent connections
- serve long-polling updates to browsers
- write an async http server without wsgi
- make async http requests from python
- build a real-time chat application in python

## When to choose
- you need many simultaneous long-lived connections like websockets or long polling
- you want a mature asyncio-integrated framework with its own high-performance http client and server
- you prefer a single-threaded, non-WSGI model with explicit coroutine-based concurrency

## When to avoid
- you need WSGI compatibility or want to deploy under standard WSGI servers like gunicorn
- your app is mostly blocking synchronous code or relies on thread-safety
- you prefer batteries-included frameworks with large ecosystems like Django or FastAPI's pydantic-based tooling

## Facets
- artifact type: framework
- maturity: stable
- function: web-framework, http-server, http-client, websocket, routing, concurrency
- domain: web-development, backend, networking
- platform: python, cross-platform, windows
- tags: asyncio, non-blocking-io, long-polling, single-threaded, real-time, linux, macos

## Member repositories
- tornadoweb/tornado (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:32.415820+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 2026-08-29T16:57:42.343745+00:00, confidence not recorded.
  - readme: https://github.com/tornadoweb/tornado (fetched 2026-08-28T04:11:32.415820+00:00, sha 321b7ec54c80)
  - homepage: http://www.tornadoweb.org/ (fetched 2026-08-29T07:55:56.958050+00:00, sha 54f14eb55a94)
  - registry_pypi: https://pypi.org/pypi/tornado/json (fetched 2026-08-29T07:55:56.982992+00:00, sha b26a924e91a9)
  - site_page: https://www.tornadoweb.org/en/stable/faq.html (fetched 2026-08-29T07:55:56.967496+00:00, sha 872ef785baa5)
  - site_page: https://www.tornadoweb.org/en/stable/releases.html (fetched 2026-08-29T07:55:56.969587+00:00, sha d48a0a169963)
  - site_page: https://www.tornadoweb.org/en/stable/releases/v6.5.8.html (fetched 2026-08-29T07:55:56.971479+00:00, sha 56820c6a5236)
  - site_page: https://www.tornadoweb.org/en/stable/releases/v6.5.7.html (fetched 2026-08-29T07:55:56.973052+00:00, sha bc4ff6243870)
  - site_page: https://www.tornadoweb.org/en/stable/releases/v6.5.6.html (fetched 2026-08-29T07:55:56.974961+00:00, sha 6b6751f132df)
  - site_page: https://www.tornadoweb.org/en/stable/releases/v6.5.5.html (fetched 2026-08-29T07:55:56.977969+00:00, sha 361b33ffe722)
  - site_page: https://www.tornadoweb.org/en/stable/releases/v6.5.4.html (fetched 2026-08-29T07:55:56.979698+00:00, sha f497808e4dad)
- Data as of 2026-08-30T08:39:29.467469+00:00.