Created April 18, 2011 00:08
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Time stdlib json versus simplejson on Python 3.2 with and without speedups
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters Python 3.2 numbers ================== (jst3)vinay@eta-natty:~/projects/scratch$ python time_json.py --no-speedups Python version: 3.2 (r32:88445, Mar 25 2011, 19:28:28) [GCC 4.5.2] 11.21484375 KiB read Timing simplejson (without speedups): 4.585145950317383 Timing stdlib json (without speedups): 3.9949100017547607 (jst3)vinay@eta-natty:~/projects/scratch$ python time_json.py Python version: 3.2 (r32:88445, Mar 25 2011, 19:28:28) [GCC 4.5.2] 11.21484375 KiB read Timing simplejson (with speedups): 0.3202629089355469 Timing stdlib json (with speedups): 0.3200039863586426 Python 2.7 numbers ================== (jst)vinay@eta-natty:~/projects/scratch$ python time_json.py --no-speedups Python version: 2.7.1+ (r271:86832, Apr 11 2011, 18:05:24) [GCC 4.5.2] 11.21484375 KiB read Timing simplejson (without speedups): 4.49118304253 Timing stdlib json (without speedups): 4.2139749527 (jst)vinay@eta-natty:~/projects/scratch$ python time_json.py Python version: 2.7.1+ (r271:86832, Apr 11 2011, 18:05:24) [GCC 4.5.2] 11.21484375 KiB read Timing simplejson (with speedups): 0.279826164246 Timing stdlib json (with speedups): 0.34278011322 This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters #!/usr/bin/env python import argparse import sys from timeit import timeit if sys.version_info[0] < 3: from urllib import urlopen else: from urllib.request import urlopen s = urlopen('http://flingo.tv/api2/get_items?app_id=flingo&guid=abc123&howmany=8').read().decode('utf-8') def compare(speedups): if speedups: descr = 'with speedups' else: descr = 'without speedups' import simplejson; simplejson._toggle_speedups(False) sys.modules['_json'] = 0; import json print('Python version: %s' % sys.version) print("%s KiB read" % (float(len(s))/1024)) stmt = 'd = json.loads(s);x = json.dumps(d)' setup='import simplejson as json;from __main__ import s' print('Timing simplejson (%s):' % descr) print(timeit(stmt, setup=setup, number=1000)) setup='import json;from __main__ import s' print('Timing stdlib json (%s):' % descr) print(timeit(stmt, setup=setup, number=1000)) def main(): parser = argparse.ArgumentParser(description='Compare simplejson and ' 'stdlib json') parser.add_argument('--no-speedups', dest='speedups', action='store_false', default=True, help='Disable speedups') args = parser.parse_args() compare(args.speedups) if __name__ == '__main__': main()You can’t perform that action at this time.
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