从python我上传文件到20 MB / s，从网络到85 MB / s。为什么？

Question

我有一个python脚本，允许你上传文件到usersfiles.com，问题是上传文件高达20 MB / s，但因为网络以85 MB / s的速度上传。什么可能到期？用于此工具带，MultipartEncoderMonitor也使用该功能。

import requests
from requests_toolbelt.multipart.encoder import MultipartEncoder, MultipartEncoderMonitor
import random
import re
import time
import os
import sys
from progressbar import AnimatedMarker, Bar, BouncingBar, Counter, ETA, \
    FileTransferSpeed, FormatLabel, Percentage, \
    ProgressBar, ReverseBar, RotatingMarker, \
    SimpleProgress, Timer

proxies = {}

class usersfiles():
    sess_id = ""
    srv_tmp_url = ""
    upload_type = ""
    uid = ""
    enlace_usersfiles = ""

    def __init__(self, params, tipo, enlace_usersfiles=""):
        sessionObj = requests.session()
        sessionObj.post("https://usersfiles.com/", data={"login":"users", "password":"pass", "op":"login"}, proxies=proxies)
        filehandle = open(params, "rb")
        self.extraccion_datos_upload(sessionObj)
        self.subir_video(sessionObj, filehandle, params)
        self.obtener_enlace_usersfiles(sessionObj, filehandle, params)

    def my_callback(self, monitor):
        self.pbar.update(monitor.bytes_read)

    def extraccion_datos_upload(self, sessionObj):
        resp = sessionObj.get("https://usersfiles.com/", proxies=proxies)
        self.sess_id = re.search('sess_id.*=?"(.*)?"', str(resp.text)).group(1)
        self.srv_tmp_url = re.search('srv_tmp_url.*=?"(.*)?"', str(resp.text)).group(1)
        self.upload_type = re.search('upload_type.*=?"(.*)?"', str(resp.text)).group(1)

    def obtener_uid(self):
        for i in range(0, 12):
            self.uid=self.uid + '' + str(random.randint(0,9))

    def subir_video(self, sessionObj, filehandle, params):
        self.obtener_uid()
        tam_arch = os.path.getsize(params)
        url="https://up11.usersfiles.com/cgi-bin/upload.cgi?upload_id="+self.uid+"&js_on=1&utype=reg&upload_type="+self.upload_type
        e = MultipartEncoder(
            fields={"upload_type":self.upload_type , "sess_id":self.sess_id, "srv_tmp_url":self.srv_tmp_url,
                "file_0":(params, filehandle, 'text/plain')}
            )
        m = MultipartEncoderMonitor(e, self.my_callback)
        progress = ProgressBar()
        widgets = [params, " (Sub-Us): ", Bar(marker="|", left="[", right=" "), Percentage(), " ",  FileTransferSpeed(), "] ", ETA()]
        self.pbar = ProgressBar(widgets=widgets, maxval=len(e)).start()
        self.r = sessionObj.post(url, data=m, headers={'Content-Type': m.content_type}, proxies=proxies)
        self.pbar.finish()

    def obtener_enlace_usersfiles(self, sessionObj, filehandle, params):
        self.enlace_usersfiles = re.search('name=.fn.>(.*?)<', str(self.r.text)).group(1)

archivo = usersfiles("Diabolik Lovers - 12.mp4", "v")