Skip to content
Branch: master
Go to file

Latest commit


Failed to load latest commit information.
Latest commit message
Commit time


How Are You - Benchmarking Python Web Frameworks

This is a benchmark suite for various Python web frameworks.


  • hello -- a simple URL without variables.
  • variable -- respond to a URL with a single string variable.
  • exception -- generate a 404 error by asking for a URL that doesn't exist. Reuses the hello applications.

To run them you can use the following:

$ virtualenv --python=python2 env/py2
$ source env/py2/bin/activate
$ pip install -U pip setuptools
$ pip install -r requirements.txt

You can now use the howareyou tool:

$ howareyou

Without any arguments it runs the hello benchmarks against all frameworks for which there is a test application implemented.

Benchmark results

The benchmark runs 100,000 requests against each web framework, using the WSGI directly. No real HTTP server is therefore involved, nor are any requests handled in parallel -- it only means how much time the framework takes in Python.

ms is the amount of milliseconds it took to fulfill all 100,000 requests. rps is the amount of requests per second the framework was able to sustain.

The benchmark also runs a single request with the profiler after this, and reports in tcalls how many function calls the request took, and in funcs how many different functions were used to handle the request.


You use the -b flag to select the benchmark to run, for instance:

$ howareyou -b variable

You use the -f flag to restrict the frameworks to benchmark, for instance:

$ howareyou -f morepath -f flask

to benchmark just Flask and Morepath.

You can use the -n flag to change the number of requests to use in the benchmark:

$ howareyou -n 1000

the default is 100000.

With the -p flag the tool also generates profile information on which functions it spent the most time in.

You can give it a -h for help. With -p you can select the benchmark, and with -f you can select the frameworks against which to run it.

Testing implementations

To check whether an implementation of a benchmark in a particular framework actually is correct, you can use the trialserver command. For example, to check whether Morepath behaves correctly with the hello benchmark use:

$ trialserver hello morepath

It starts up a web server on port 8000. You can point your web browser to it and make experimental requests.


This benchmark is adapted from the 01-hello example by Andriy Kornatskyy, author of wheezy.web.

I've simplified things considerably. I only install web frameworks that seem to be reasonably popular and that are easy to install from PyPI with pip. I've excluded some frameworks because they seemed very slow; it's possible they aren't actually slow but that the benchmark code was broken, but I didn't want to bother.

In addition there's Morepath, authored by myself, and wheezy.web, as Andriy wrote that.

A previous iteration of this tool just included the hello test. I've since expanded the tool so you can run multiple benchmarks with it.


A benchmarking tool for Python web frameworks



No releases published


You can’t perform that action at this time.