json モジュールの速度比較(Python 3 系)

run.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from timer import Timer
import csv
import json
import simplejson
import ujson

JSON_FILE='dummy_1000.json'
CSV_FILE='dummy_1000.csv'

print('decode -----------------------------------------------')
with open(JSON_FILE) as f:
    with Timer() as t:
        data = json.load(f)
    print('%s' % t.secs)
    # print('=> elasped json       : %s s' % t.secs)

with open(JSON_FILE) as f:
    with Timer() as t:
        data = simplejson.load(f)
    print('%s' % t.secs)
    # print('=> elasped simplejson : %s s' % t.secs)

with open(JSON_FILE) as f:
    with Timer() as t:
        data = ujson.load(f)
    print('%s' % t.secs)
    # print('=> elasped ujson      : %s s' % t.secs)

print('encode -----------------------------------------------')
with open(CSV_FILE) as f:    
     with Timer() as t:
        result = []
        for line in csv.DictReader(f):
           line_json = json.dumps(line)
           result.append(line_json)
     print('%s' % t.secs)
     # print('=> elasped json       : %s s' % t.secs)

with open(CSV_FILE) as f:    
     with Timer() as t:
        result = []
        for line in csv.DictReader(f):
           line_json = simplejson.dumps(line)
           result.append(line_json)
     print('%s' % t.secs)
     # print('=> elasped simplejson : %s s' % t.secs)

with open(CSV_FILE) as f:    
     with Timer() as t:
        result = []
        for line in csv.DictReader(f):
           line_json = ujson.dumps(line)
           result.append(line_json)
     print('%s' % t.secs)
     # print('=> elasped ujson      : %s s' % t.secs)

• timer.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import time

class Timer(object):
    def __init__(self, verbose=False):
        self.verbose = verbose

    def __enter__(self):
        self.start = time.time()
        return self

    def __exit__(self, *args):
        self.end = time.time()
        self.secs = self.end - self.start
        self.msecs = self.secs * 1000  # millisecs
        if self.verbose:
            print('elapsed time: %f ms' % self.msecs)