The referenced post has examples of simplejson taking 10x more time than cjson. 10x difference in a component is noticeable for some applications.
It also shows that pickle is much slower and has 2x bigger output than json for "objects". (For strings, they all should be roughly the same.) I mention pickle because it's used by memcache. Since both pickle and json should be very efficient for strings, it may make sense to memcache json output instead of objects. In addition, some people are using pickle to create datastore blobs. Perhaps json is a better choice. On Mar 24, 1:39 pm, David Wilson <d...@botanicus.net> wrote: > Just idly wondering, > > Have you done any quantitative measurement of how "bad" simplejson is? > I can't imagine it being a large overhead, unless your application is > seriously optimized to extremes already. > > David > > 2009/3/24 Andy Freeman <ana...@earthlink.net>: > > > > > > > > > That's why issue 1174 requests the fastest possible json, not cjson. > > > 1174 actually requests multiple jsons, so folks can use what's best > > for their application. > > > On Mar 23, 10:32 pm, Joseph Turian <tur...@gmail.com> wrote: > >> I am the author of the blog post. > > >> <b>Update (20090324):</b> According to <a href="http:// > >> kbyanc.blogspot.com/2007/07/python-serializer-benchmarks.html" > >> rel="nofollow">Extra Cheese</a>, cjson 1.0.5 has an incompatibility > >> with simplejson in processing slashes. A fix is available from <a > >> href="http://www.vazor.com/cjson.html"; rel="nofollow">Matt > >> Billenstein</a>. However, Dan Pascu, the author of cjson, deprecates > >> Matt Billenstein's cjson 1.0.6 because Matt's patch parses the JSON > >> twice, which makes it twice as slow. This will still be faster than > >> all alternatives in certain circumstances. You will not find Matt's > >> cjson on the cheeseshop, only on Matt's site. > > >> On Mar 23, 10:55 am, Andy Freeman <ana...@earthlink.net> wrote: > > >> > According > >> > tohttp://blog.metaoptimize.com/2009/03/22/fast-deserialization-in-python/ > >> > , simplejson is significantly slower than cjson. > > >> > I've created an issue requesting the fastest possible json > >> > athttp://code.google.com/p/googleappengine/issues/detail?id=1174.-Hide > >> > quoted text - > > >> - Show quoted text - > > -- > It is better to be wrong than to be vague. > — Freeman Dyson- Hide quoted text - > > - Show quoted text - --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
