Benchmarking LFS

This section describes how to benchmark LFS.

Overview

The development buildout comes with lfs_bench, a small application, which provides some tools to benchmark LFS.

You can use it in case you want to optimize LFS in terms of speed. In case you want to development a new feature, please compare the versions with and without this feature and try to not slow down LFS.

JMeter

1. Install JMeter

2. Prepare the database:

   $ bin/django lfs_init
   $ bin/django lfs_generate_content_for_benchmark

3. Start LFS

• Start LFS in production mode, for instance with bin/django-gunicorn. and a reverse proxy in front of it. In other words don’t use the development server.
• Set DEBUG to False

4. Start JMeter

Make sure you start it from the buildout base directory (that’s the same directory you start Django from):

$ /path/to/jmeter/bin/jmeter -t src/lfs_bench/lfs_bench/jmeter/lfs.jmx -p src/lfs_bench/lfs_bench/jmeter/user.properties

5. Execute the Testplan and check the result within Summary Report for instance.

Apache Benchmark - ab

1. Prepare the database:

   $ bin/django lfs_init
   $ bin/django lfs_generate_content_for_benchmark

2. Start LFS

• Start LFS in production mode, for instance with bin/django-gunicorn. and a reverse proxy in front of it. In other words don’t use the development server.
• Set DEBUG to False

3. Use ab, for instance like that:

   $ ab -n 1000 -c 20 http://localhost/product-1-1-1

4. Check the results.

Python Profiling

The development buildout provides a middleware by default, which let you profile single requests. Just suffix the request with ?prof in order to get profiling data, for instance:

http://localhost/product-1-1-1?prof

See also:

• JMeter
• Apache Benchmark - ab
• Python stats reference