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65 lines
2.4 KiB
Markdown
65 lines
2.4 KiB
Markdown
---
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layout: post
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status: publish
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published: true
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title: Profiling a Python Script
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author: Julien Lengrand-Lambert
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author_login: jlengrand
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author_email: julien@lengrand.fr
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author_url: http://www.lengrand.fr
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wordpress_id: 546
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wordpress_url: http://www.lengrand.fr/?p=546
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date: 2012-02-29 11:43:08.000000000 +01:00
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categories:
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- Python
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tags:
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- project euler
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- profile
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- profiler
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- module
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- stack overflow
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comments: []
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---
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Here are some simple ways to profile Python scripts.I heavily use this to check my <strong><a title="PE solutions" href="http://github.com/jlengrand/project_euler" target="_blank">Project Euler solutions</a></strong>.
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<h1></h1>
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<h1><strong>SOLUTION 1:</strong></h1>
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The main common option would be to use the <a title="profile" href="http://docs.python.org/library/profile.html?highlight=profile#cProfile" target="_blank"><strong>profile</strong> </a>(or <strong><a title="cprofile" href="http://docs.python.org/library/profile.html?highlight=profile#cProfile" target="_blank">cprofile</a></strong>) module.There are two different ways of using it :
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<ul>
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<li>As a module, by directly running</li>
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</ul>
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<div>{% highlight python %}
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python -m cProfile script.py
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{% endhighlight %}
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</div>
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<div></div>
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<div>
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<ul>
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<li>In your code, by importing the utilities</li>
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</ul>
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<div>{% highlight python %}
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import cProfile
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cProfile.run('function()') # in your __main__
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{% endhighlight %}
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<em>Bonus : You can use several options for sorting results using the -s switch (cumulative/name/time/file sorting are available).</em>
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<h1><strong>SOLUTION 2:</strong></h1>
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If you want to avoid using a command line, or you don't have the profile module installed; here os another possibility. There is also the <strong><a title="timeit module" href="http://docs.python.org/library/timeit.html" target="_blank">timeit </a></strong>module available.
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{% highlight python %}
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import timeit
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t1 = timeit.Timer("function()", "from __main__ import function")
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print t1.timeit(1)
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{% endhighlight %}
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I use this option on Eclipse because I didn't want to install the profile module on Windows.
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This is however less clear, and way less detailed while still useful :).
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Choose you profiler option and get on <a title="PE" href="http://projecteuler.net/" target="_blank"><strong>Project Euler</strong> </a>!
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[<a title="SO" href="http://stackoverflow.com/questions/582336/how-can-you-profile-a-python-script" target="_blank">Stack Overflow</a>]
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</div>
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</div>
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