Im trying to download webpage or files from url using socket but it run really slow at EOF

Question

        result = s.recv(8192)
        num_bytes_recv += len(result)
        index = result.find('\r\n\r\n')
        result_wo_header = result[index+4:]
        data = ""
        with open(file_name, 'wb') as f:
            data+=result_wo_header
            while True:
                print "number of byte recieve : ",num_bytes_recv
                result = s.recv(8192)
                print result
                if not result: 
                    break
                num_bytes_recv+=len(result)
                data+=result
            f.write(data)   
        print "download complete"
        s.close()

Im trying to download any kinds of file from a given url, the code work perfectly until it reach the end or the last chunk of data, it stuck there up to 10 second. Am I doing anything wrong here? up to 5~10 second from last "number of byte recieve : " to "download complete" please help!!