tag:blogger.com,1999:blog-8885167082319491081.post-56669211928559968382008-04-07T18:26:00.004-04:002008-04-07T18:45:46.515-04:002008-04-07T18:45:46.515-04:00<p> Ola. So I was working on a project and noticed that json encoding/decoding of a string to string dictionary was taking... uhhh 70% of the time. The are a few other benchmarks out there (<a href="http://kbyanc.blogspot.com/2007/07/python-serializer-benchmarks.html">kbyanc</a>, <a href="http://blog.hill-street.net/?p=7">hill-street</a>), but none including the new simplejson 1.8.1 which has extensions to improve performance (links below). </p> <h3>My Tests</h3> <p> I'm only serializing dictionary mapping strings to strings. Maybe occasionally dict within a dict, but always primitive types. I don't need special ways of serializing custom objects. This test is just raw primitive types and data structure performance. </p> <p> For this test, I made two dictionary with a dozen entries. One has both keys and value as ascii regular python strings, the other had the same data but used unicode strings. </p> <h3> cjson 1.0.6 </h3> <a href="http://www.vazor.com/cjson.html">cjson 1.0.6</a>, which has the bug fix described <a href="http://blog.extracheese.org/2007/07/when-json-isnt-json.html">here</a> and the original source and homepage is <a href="http://python.cx.hu/python-cjson/">over here</a>. It's bit confusing, but it's worth it: <pre> Serialization, cjson, ascii: 94 Serialization, cjson, unicode: 117 Deserialization, cjson, ascii: 80 </pre> <h3> simplejson 1.8.1</h3> <p> Available <a href="http://pypi.python.org/pypi/simplejson/1.8">here</a> The author maintains a <a href="http://bob.pythonmac.org/archives/category/python/simplejson/ ">blog</a>. <p> This version has c-extensions for both encode and decode </p> <pre> Serialization, simplejson, ascii: 549 Serialization, simplejson, unicode: 592 Deserialization, simplejson, ascii: 2068 </pre> <h3> simplejson 1.6 </h3> <p> This version is 100% pure python. It can be grabbed <a href="http://pypi.python.org/pypi/simplejson/1.6">here</a> </p> <pre> Serialization, simplejson, ascii: 2150 Serialization, simplejson, unicode: 1744 Deserialization, simplejson, ascii: 3318 </pre> <h3> Conclusion </h3> <p>Well, guess which version I'll be using. simplejson has all sorts of other features that you might want. Sometimes speed isn't everything, but for my application it is. Enjoy!</p>nickghttp://www.blogger.com/profile/04659163622120256748noreply@blogger.com0