why push_transaction is very slow about eospy HOT 6 CLOSED

    def push_transaction(self, transaction, keys, broadcast=True, compression='none') :
        ''' '''
        t0 = time.time()
        chain_info,lib_info = self.get_chain_lib_info()
        t1 = time.time()
        trx = Transaction(transaction, chain_info, lib_info)
        t2 = time.time()
        #encoded = trx.encode()
        digest = sig_digest(trx.encode(), chain_info['chain_id'])
        t3 = time.time()
        # sign the transaction
        signatures = []
        if not isinstance(keys, list) :
            keys = [keys]
        for key in keys :
            if check_wif(key) :
                k = EOSKey(key)
            elif isinstance(key, EOSKey) :
                k = key
            else :
                raise ValueError('Must pass a WIF string or EOSKey')
            signatures.append(k.sign(digest))
        # build final trx

        final_trx = {
                'compression' : compression,
                'transaction' : trx.__dict__,
                'signatures' : signatures
        }
        data = json.dumps(final_trx, cls=EOSEncoder)
        if broadcast :
            t4 = time.time()
            ret = self.post('chain.push_transaction', params=None, data=data)
            t5 = time.time()
            logger.info("testpush pyeos push transaction t1 %f %f %f %f %f  " % (t5-t4, t4-t3, t3-t2, t2-t2, t1-t0))
            return ret
        return data

2018-10-22 14:33:33,628 cron [reveal3.py:207] [reveal3:reveal] [INFO]- testpush pyeos push transaction t1 0.262906 0.680234 0.000355 0.000000 0.618895
2018-10-22 14:33:33,628 cron [reveal3.py:209] [reveal3:reveal] [INFO]- testpush t1 0.505181 t2 1.563141, len 1 ,https://node.betdice.one
2018-10-22 14:33:36,860 cron [reveal3.py:241] [reveal3:clean] [INFO]- testpush pyeos push transaction t1 0.272354 0.746254 0.000295 0.000000 0.627473
2018-10-22 14:33:41,592 cron [reveal3.py:207] [reveal3:reveal] [INFO]- testpush pyeos push transaction t1 0.810577 0.754046 0.000304 0.000000 0.635905
2018-10-22 14:33:41,592 cron [reveal3.py:209] [reveal3:reveal] [INFO]- testpush t1 0.266842 t2 2.201648, len 1 ,https://node.betdice.one
2018-10-22 14:33:44,992 cron [reveal3.py:241] [reveal3:clean] [INFO]- testpush pyeos push transaction t1 0.409997 0.534914 0.000298 0.000000 0.724628
2018-10-22 14:33:49,904 cron [reveal3.py:207] [reveal3:reveal] [INFO]- testpush pyeos push transaction t1 0.440897 0.419582 0.000298 0.000000 1.158752
2018-10-22 14:33:49,904 cron [reveal3.py:209] [reveal3:reveal] [INFO]- testpush t1 0.623600 t2 2.020310, len 1 ,https://node.betdice.one
2018-10-22 14:33:55,501 cron [reveal3.py:241] [reveal3:clean] [INFO]- testpush pyeos push transaction t1 0.373271 0.690031 0.000309 0.000000 0.523841
2018-10-22 14:34:00,016 cron [reveal3.py:207] [reveal3:reveal] [INFO]- testpush pyeos push transaction t1 0.253978 0.430541 0.000308 0.000000 2.890502
2018-10-22 14:34:00,017 cron [reveal3.py:209] [reveal3:reveal] [INFO]- testpush t1 0.275315 t2 3.576005, len 1 ,https://node.betdice.one
2018-10-22 14:34:04,197 cron [reveal3.py:241] [reveal3:clean] [INFO]- testpush pyeos push transaction t1 0.256069 1.133181 0.000297 0.000000 0.940432
2018-10-22 14:34:10,392 cron [reveal3.py:207] [reveal3:reveal] [INFO]- testpush pyeos push transaction t1 0.950557 0.847115 0.000306 0.000000 0.662502
2018-10-22 14:34:10,392 cron [reveal3.py:209] [reveal3:reveal] [INFO]- testpush t1 0.361795 t2 2.461179, len 1 ,https://node.betdice.one
2018-10-22 14:34:12,926 cron [reveal3.py:241] [reveal3:clean] [INFO]- testpush pyeos push transaction t1 0.277198 0.678810 0.000309 0.000000 0.577521
2018-10-22 14:34:17,796 cron [reveal3.py:207] [reveal3:reveal] [INFO]- testpush pyeos push transaction t1 0.385666 0.598964 0.000309 0.000000 0.660867
2018-10-22 14:34:17,797 cron [reveal3.py:209] [reveal3:reveal] [INFO]- testpush t1 0.292558 t2 1.646578, len 1 ,https://node.betdice.one
2018-10-22 14:34:21,999 cron [reveal3.py:241] [reveal3:clean] [INFO]- testpush pyeos push transaction t1 0.288089 0.622102 0.000298 0.000000 0.882234
2018-10-22 14:49:34,480 cron [reveal3.py:207] [reveal3:reveal] [INFO]- testpush pyeos push transaction t1 0.254058 0.972861 0.000308 0.000000 0.738683
2018-10-22 14:49:34,480 cron [reveal3.py:209] [reveal3:reveal] [INFO]- testpush t1 0.297338 t2 1.966620, len 1 ,https://node.betdice.one
2018-10-22 14:49:38,315 cron [reveal3.py:241] [reveal3:clean] [INFO]- testpush pyeos push transaction t1 0.386651 0.762413 0.000289 0.000000 0.654372
2018-10-22 14:55:51,221 cron [reveal3.py:207] [reveal3:reveal] [INFO]- testpush pyeos push transaction t1 0.259884 0.719956 0.000316 0.000000 0.732728
2018-10-22 14:55:51,221 cron [reveal3.py:209] [reveal3:reveal] [INFO]- testpush t1 0.392273 t2 1.713637, len 1 ,https://node.betdice.one
2018-10-22 14:55:55,153 cron [reveal3.py:241] [reveal3:clean] [INFO]- testpush pyeos push transaction t1 0.234202 0.430292 0.000320 0.000000 0.804622

215         t1 = time.time()
216         for bet in bet_list:
217             betid = bet['id']
218             server_seed = bet['server_seed']
219             act = make_push_data(ce, from_, betid, server_seed)
220             actions.append(act)
221
224         trx = {"actions": actions}
226         t2 = time.time()
227         resp = ce.push_transaction(trx, key, broadcast=True)
228         t3 = time.time()
229         logger.info("testpush t1 %f t2 %f, len %d ,%s " % (t2-t1, t3-t2, len(bet_list), consts.chain_url))

● update_open.service - gunicorn daemon
   Loaded: loaded (/etc/systemd/system/update_open.service; disabled; vendor preset: enabled)
   Active: active (running) since Wed 2018-10-24 00:08:58 CST; 45min ago
 Main PID: 3581 (python3)
    Tasks: 1
   Memory: 45.1M
      CPU: 51.803s
   CGroup: /system.slice/update_open.service
           └─3581 /home/nb/virtualenv/bin/python3 shell/update_open.py > /dev/null 2>&1 &

Oct 24 00:12:35 iZj6c5tuedcseyv7tmwgdcZ python3[3581]: get game account  xxx
Oct 24 00:12:35 iZj6c5tuedcseyv7tmwgdcZ python3[3581]: get game account  xxx
Oct 24 00:12:35 iZj6c5tuedcseyv7tmwgdcZ python3[3581]: get game account  xxx
Oct 24 00:12:35 iZj6c5tuedcseyv7tmwgdcZ python3[3581]: get game account  xxx
Oct 24 00:12:35 iZj6c5tuedcseyv7tmwgdcZ python3[3581]: get game account  xxx
Oct 24 00:12:35 iZj6c5tuedcseyv7tmwgdcZ python3[3581]: get reveal account  xxx
Oct 24 00:12:35 iZj6c5tuedcseyv7tmwgdcZ python3[3581]: account push  xxx
Oct 24 00:12:35 iZj6c5tuedcseyv7tmwgdcZ python3[3581]: push  {'transaction_id': 'c74dcd691a1951cb717ea5b8c8d9b70341159ba954feb2c8f5efbe9e9f5e70c7',
Oct 24 00:12:35 iZj6c5tuedcseyv7tmwgdcZ python3[3581]: st': '5430b24a80e720d46bfdc2d24c1f9cba3ca82ab430a31db35566954bcef3fc02', 'global_sequence':
Oct 24 00:12:35 iZj6c5tuedcseyv7tmwgdcZ python3[3581]: ization': [{'actor': 'xxx', 'permission': 'active'}], 'data': {'from': 'xxx

root@iZj6c5tuedcseyv7tmwgdcZ:~# strace -p 3581
strace: Process 3581 attached
recvfrom(17,

    def get_url(self, url, params=None, json=None) :
        # get request
        r = requests.get(url,params=params, json=json, timeout=4)
        r.raise_for_status()
        return r.json()

    def post_url(self, url, params=None, json=None, data=None) :
        # post request
        r = requests.post(url,params=params, json=json, data=data, timeout=4)
        try :
            r.raise_for_status()
        except :
            raise requests.exceptions.HTTPError('Error: {}'.format(r.json()))
        return r.json()