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"""
Simple benchmark script to do some basic speed tests of json libs
"""
import sys
import time
import urllib
_small = """
{
"name": "benchmark test",
"foo": "bar",
"age": 32,
"weight": 100,
"Height": 154.12,
"married": false,
"siblings": [],
"bar": null
}
"""
_deep = """
{
"foo": "bar",
"nest": {
"foo": %(_small)s,
"nest": {
"foo": %(_small)s,
"nest": {
"foo": %(_small)s,
"nest": {
"foo": %(_small)s,
"nest": {
"foo": %(_small)s,
"nest": %(_small)s
}
}
}
}
}
}
""" % locals()
_big = """
{
"biglist": [%(_deep)s, %(_small)s, %(_deep)s, %(_small)s, %(_deep)s,
%(_deep)s, %(_small)s, %(_deep)s, %(_small)s, %(_deep)s,
%(_deep)s, %(_small)s, %(_deep)s, %(_small)s, %(_deep)s,
%(_deep)s, %(_small)s, %(_deep)s, %(_small)s, %(_deep)s,
%(_deep)s, %(_small)s, %(_deep)s, %(_small)s, %(_deep)s,
%(_deep)s, %(_small)s, %(_deep)s, %(_small)s, %(_deep)s,
%(_deep)s, %(_small)s, %(_deep)s, %(_small)s, %(_deep)s,
%(_deep)s, %(_small)s, %(_deep)s, %(_small)s, %(_deep)s,
%(_deep)s, %(_small)s, %(_deep)s, %(_small)s, %(_deep)s,
%(_deep)s, %(_small)s, %(_deep)s, %(_small)s, %(_deep)s,
%(_deep)s, %(_small)s, %(_deep)s, %(_small)s, %(_deep)s,
%(_deep)s, %(_small)s, %(_deep)s, %(_small)s, %(_deep)s,
%(_deep)s, %(_small)s, %(_deep)s, %(_small)s, %(_deep)s,
%(_deep)s, %(_small)s, %(_deep)s, %(_small)s, %(_deep)s,
%(_deep)s, %(_small)s, %(_deep)s, %(_small)s, %(_deep)s,
%(_deep)s, %(_small)s, %(_deep)s, %(_small)s, %(_deep)s,
%(_deep)s, %(_small)s, %(_deep)s, %(_small)s, %(_deep)s,
%(_small)s, %(_small)s, %(_small)s, %(_small)s, %(_small)s],
"entry1": %(_small)s,
"entry2": %(_deep)s,
"entry3": %(_small)s,
"entry4": %(_deep)s,
"entry5": %(_small)s,
"entry6": %(_deep)s
}
""" % locals()
# The following two will contain real world json from twitter and reddit if
# script is run with the --download flag
_reddit = "[]"
_twitter = "[]"
def load_external_json():
global _reddit, _twitter
_reddit = urllib.urlopen("http://reddit.com/.json").read()
_twitter = urllib.urlopen("http://api.twitter.com/1/statuses/user_timeline.json?screen_name=twitterapi&count=200").read()
def do_benchmark(impspec, json, runs=10):
modulename, parsename, emitname = impspec
try:
__import__(modulename)
mod = sys.modules[modulename]
reads = getattr(mod, parsename)
dumps = getattr(mod, emitname)
except:
return None
start = time.time()
for n in xrange(runs):
data = reads(json)
readtime = time.time() - start
start = time.time()
for n in xrange(runs):
devnull = dumps(data)
return readtime, time.time() - start # tuple (readtime, writetime)
modules = [("json", "loads", "dumps"),
("simplejson", "loads", "dumps"),
("yajl", "loads", "dumps"),
("cjson", "decode", "encode"),
("django.utils.simplejson", "loads", "dumps"),
("jsonpickle", "decode", "encode"),
("jsonlib", "read", "write"),
("jsonlib2", "read", "write"),
#("demjson", "decode"), terribly slow. wont include it
]
if len(sys.argv) > 1 and sys.argv[1] == "--download":
load_external_json()
res = []
runs = 100
for e in modules:
res.append((e[0], do_benchmark(e, _small, runs),
do_benchmark(e, _deep , runs),
do_benchmark(e, _big, runs),
do_benchmark(e, _reddit, runs),
do_benchmark(e, _twitter, runs),
))
no_res = set([e for e in res if e[1] is None])
res = list(set(res) - no_res)
res = [(e[0], sum(map(lambda x:x[0], e[1:])), sum(map(lambda x:x[1], e[1:]))) for e in res]
res.sort(lambda a,b: cmp((a[1]+a[2]), b[1]+b[2]))
print "Total Read Write Implementation"
print "-----------------------------------"
for e in res:
print "%.3f %.3f %.3f %s" % (e[1]+e[2], e[1], e[2], e[0])
for e in no_res:
print "Not installed:", e[0]
|
