Introducing Robyn: A High‑Performance Asynchronous Python Web Framework

For Python developers faced with a plethora of web frameworks such as Flask, Django, and FastAPI, the article recommends trying Robyn, a fast, modern, and high‑performance asynchronous framework.

What is Robyn?

Robyn is an async‑oriented Python web framework built on Rust, combining Rust’s speed with Python’s ease of use to provide a quick, modern, and developer‑friendly web development experience.

Robyn Highlights

Performance

Because its core HTTP server is written in Rust, Robyn outperforms traditional Python frameworks, handling hundreds of thousands of requests per second, comparable to Node.js or Go.

Asynchronous Design

Robyn fully embraces Python’s async and await syntax, allowing massive I/O‑bound workloads to run concurrently on a single thread, which is ideal for real‑time chat, API services, and other high‑concurrency scenarios.

Easy to Learn

The API is clean and intuitive; developers familiar with FastAPI will feel at home, and beginners can quickly create functional endpoints.

Example

from robyn import Robyn

# Initialize Robyn app
app = Robyn(__file__)

# Define routes and handlers
@app.get("/")
async def hello_world():
    return "Hello, World!"

@app.get("/greet/{name}")
async def greet_name(name):
    return f"Hello, {name}!"

# Start the server
app.start(port=8080)

The example creates a Robyn instance, defines two routes (a simple hello world and a personalized greeting), and starts the server on port 8080.

Routing

@app.get("/items/{item_id}")
async def get_item(item_id):
    return {"item_id": item_id}

Routes work like FastAPI: path parameters are automatically parsed and passed to the handler. Robyn also supports dynamic routes, regex matching, and more.

Other Common Features

Asynchronous ORM support for databases

Template rendering

Custom middleware and plugins

WebSocket support for real‑time communication

Use Cases for Robyn

High‑traffic API services (finance, logistics, social platforms)

Real‑time applications (chat, online games, data push)

Microservice architectures where lightweight, high‑performance services are needed

The article concludes by encouraging readers to consider Robyn for their next project.