[Python-Dev] Status of json (simplejson) in cpython (original) (raw)

Michael Foord fuzzyman at voidspace.org.uk
Sun Apr 17 00:48:45 CEST 2011

On 16/04/2011 22:28, "Martin v. Löwis" wrote:

Am 16.04.2011 21:13, schrieb Vinay Sajip:

Martin v. Löwis<martin v.loewis.de> writes:

Does it actually need improvement? I can't actually say, but I assume it keeps changing for the better - albeit slowly. I wasn't thinking of specific improvements, just the idea of continuous improvement in general... Hmm. I cannot believe in the notion of "continuous improvement"; I'd guess that it is rather "continuous change". I can see three possible areas of improvment: 1. Bugs: if there are any, they should clearly be fixed. However, JSON is a simple format, so the implementation should be able to converge to something fairly correct quickly. 2. Performance: there is always room for performance improvements. However, I strongly recommend to not bother unless a severe bottleneck can be demonstrated. Well, there was a 5x speedup demonstrated comparing simplejson to the standard library json module. That sound like very worth pursuing (and crazy not to pursue). I've had json serialisation be the bottleneck in web applications generating several megabytes of json for some requests.

All the best,

Michael Foord

3. API changes: people apparently want JSON to be more flexible wrt. Python types that are not directly supported in JSON. I'd rather take a conservative approach here, involving a lot of people before adding an API feature or even an incompatibility.

Regards, Martin

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