On Fri, Apr 15, 2011 at 4:12 PM, Antoine Pitrou <solip...@pitrou.net> wrote: > On Fri, 15 Apr 2011 14:27:04 -0700 > Bob Ippolito <b...@redivi.com> wrote: >> On Fri, Apr 15, 2011 at 2:20 PM, Antoine Pitrou <solip...@pitrou.net> wrote: >> > Le vendredi 15 avril 2011 à 14:18 -0700, Bob Ippolito a écrit : >> >> On Friday, April 15, 2011, Antoine Pitrou <solip...@pitrou.net> wrote: >> >> >> >> >> >> > Since the JSON spec is set in stone, the changes >> >> >> > will mostly be about API (indentation, object conversion, etc) >> >> >> > and optimization. I presume the core parsing logic won't >> >> >> > be changing much. >> >> >> >> >> >> Actually the core parsing logic is very different (and MUCH faster), >> >> > >> >> > Are you talking about the Python logic or the C logic? >> >> >> >> Both, actually. IIRC simplejson in pure python typically beats json >> >> with it's C extension. >> > >> > Really? It would be nice to see some concrete benchmarks against both >> > repo tips. >> >> Maybe in a few weeks or months when I have time to finish up the >> benchmarks that I was working on... but it should be pretty easy for >> anyone to show that the version in CPython is very slow (and uses a >> lot more memory) in comparison to simplejson. > > Well, here's a crude microbenchmark. I'm comparing 2.6+simplejson 2.1.3 > to 3.3+json, so I'm avoiding integers: > > * json.dumps: > > $ python -m timeit -s "from simplejson import dumps, loads; \ > d = dict((str(i), str(i)) for i in range(1000))" \ > "dumps(d)" > > - 2.6+simplejson: 372 usec per loop > - 3.2+json: 352 usec per loop > > * json.loads: > > $ python -m timeit -s "from simplejson import dumps, loads; \ > d = dict((str(i), str(i)) for i in range(1000)); s = dumps(d)" \ > "loads(s)" > > - 2.6+simplejson: 224 usec per loop > - 3.2+json: 233 usec per loop > > > The runtimes look quite similar.
That's the problem with trivial benchmarks. With more typical data (for us, anyway) you should see very different results. -bob _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
