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    <p>"Cross-platform support (Python, Java, C#, C++, Ruby, Perl)"</p> <p>Too bad this criteria is first. The intent behind most languages is to express fundamental data structures and processing differently. That's what makes multiple languages a "problem": they're all different. </p> <p>A single representation that's good across many languages is generally impossible. There are compromises in richness of the representation, performance or ambiguity.</p> <p>JSON meets the remaining criteria nicely. Messages are compact and parse quickly (unlike XML). Nesting is handled nicely. Changing structure without breaking code is always iffy -- if you remove something, old code will break. If you change something that was required, old code will break. If you're adding things, however, JSON handles this also.</p> <p>I like human-readable. It helps with a lot of debugging and trouble-shooting.</p> <p>The subtlety of having Python tuples turn into lists isn't an interesting problem. The receiving application already knows the structure being received, and can tweak it up (if it matters.)</p> <hr> <p>Edit on performance.</p> <p>Parsing the XML and JSON documents from <a href="http://developers.de/blogs/damir_dobric/archive/2008/12/27/performance-comparison-soap-vs-json-wcf-implementation.aspx" rel="nofollow noreferrer">http://developers.de/blogs/damir_dobric/archive/2008/12/27/performance-comparison-soap-vs-json-wcf-implementation.aspx</a></p> <p>xmlParse 0.326 jsonParse 0.255</p> <p>JSON appears to be significantly faster for the same content. I used the Python SimpleJSON and ElementTree modules in Python 2.5.2.</p>
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    1. POWhat's the best serialization method for objects in memcached?
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    1. CO-1 Sorry, but XML is typically faster, eg http://dev.robertmao.com/2007/10/01/json-vs-xml-parsing-performance/. Will remove when you update. People just prefer JSON because it's easier to deal with in Javascript.
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    2. COAlso http://developers.de/blogs/damir_dobric/archive/2008/12/27/performance-comparison-soap-vs-json-wcf-implementation.aspx
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    3. COInteresting. Here, JSON's faster: http://www.crossedconnections.org/w/index.php/2006/06/20/json-vs-xml-performance-update/
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