squeaky-pl/japronto

★ 8,544CAudience · developerComplexity · 4/5LicenseSetup · hard

Mindmap

mindmap
  root((japronto))
    What It Does
      Python web framework
      1M requests per second
      C-based HTTP core
    Tech Under Hood
      C server core
      uvloop event loop
      picohttpparser
    Features
      Sync handlers
      Async handlers
      HTTP pipelining
    Limitations
      Early stage tool
      Not for beginners
      Development paused

mindmap root((japronto)) What It Does Python web framework 1M requests per second C-based HTTP core Tech Under Hood C server core uvloop event loop picohttpparser Features Sync handlers Async handlers HTTP pipelining Limitations Early stage tool Not for beginners Development paused

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Things people build with this

USE CASE 1

Benchmark Python HTTP throughput at near-compiled-language speeds to compare frameworks or study performance limits.

USE CASE 2

Build a minimal high-throughput HTTP endpoint in Python that needs to handle an extreme volume of simple requests.

USE CASE 3

Study how a Python web framework can be accelerated by writing the core server loop in C with a fast async event loop.

Tech stack

CPythonuvlooppicohttpparser

Getting it running

Difficulty · hard Time to first run · 1h+

Requires a C compiler and Python development headers, early-stage project not recommended for production use.

MIT license, free to use, modify, and distribute for any purpose, including commercial projects.

In plain English

Japronto is a Python web framework focused on raw speed. It is designed to handle HTTP requests as fast as possible, and benchmarks shown in the README demonstrate it processing over a million requests per second on a standard cloud server. The name comes from Portuguese meaning "already done," which reflects its emphasis on quick responses. Under the hood, Japronto is built differently from most Python web frameworks. The core server is written in C rather than Python, which lets it avoid a lot of the overhead that slows down typical Python HTTP handling. It uses two external components to achieve this: uvloop (a fast async event loop based on libuv) for handling input and output without blocking, and picohttpparser (a minimal C library) for parsing HTTP headers quickly. The result is a Python framework with performance closer to what you would expect from a compiled language. Writing a web application with Japronto looks similar to other Python frameworks. You define functions that handle specific URL routes, and the framework calls them when a matching request comes in. It supports both regular synchronous functions and asynchronous ones for tasks that involve waiting, such as database queries. It also supports HTTP pipelining, where multiple requests can be sent on a single connection before waiting for responses. The project README is direct about its limitations: it is an early-stage tool aimed at experienced developers who are comfortable working at a low level and understand some C. It is not recommended for production use and is not suited for beginners. Active development has paused, though the project accepts contributions. It is released under the MIT license.

Copy-paste prompts

Prompt 1

Using Japronto, write a Python HTTP handler that accepts POST requests with a JSON body and returns a JSON response, show me the minimal working server.

Prompt 2

Show me how to define multiple URL routes in Japronto with both synchronous and asynchronous handler functions, and explain when to use each.

Prompt 3

I want to benchmark Japronto against FastAPI on my machine. Write a minimal hello-world server in each and show me the wrk command to compare requests per second.

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