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

Vinay Sajip vinay_sajip at yahoo.co.uk
Mon Apr 18 10:33:23 CEST 2011

Nick Coghlan <ncoghlan gmail.com> writes:

Consider trying:

import sys sys.modules["json"] = 0 # Block the C extension import json in a fresh interpreter.

Thanks for the tip. The revised script at

shows more believable numbers vis-à-vis the no-speedups case. Interestingly this morning, stdlib json wins in both cases, though undoubtedly YMMV.

(jst3)vinay at 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 at 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

Regards,

Vinay Sajip