diff --git a/examples/flow_printer.py b/examples/flow_printer.py
index d0363f4..1b589ad 100644
--- a/examples/flow_printer.py
+++ b/examples/flow_printer.py
@@ -22,7 +22,7 @@ import sys
 
 
 path = sys.argv[1]
-flow_streamer = NFStreamer(source=path)
+flow_streamer = NFStreamer(source=path, idle_timeout=5)
 try:
     for flow in flow_streamer:
         print(flow)
diff --git a/nfstream/__init__.py b/nfstream/__init__.py
index 5498bbe..23a7d0f 100644
--- a/nfstream/__init__.py
+++ b/nfstream/__init__.py
@@ -18,8 +18,8 @@ If not, see <http://www.gnu.org/licenses/>.
 """
 
 
-from nfstream.streamer import NFStreamer
-from nfstream.plugin import NFPlugin
+from .streamer import NFStreamer
+from .plugin import NFPlugin
 
 """
     streamer module is the core module of nfstream package.
diff --git a/nfstream/cache.py b/nfstream/cache.py
index 57a65af..ce13412 100644
--- a/nfstream/cache.py
+++ b/nfstream/cache.py
@@ -74,7 +74,7 @@ class NFCache(object):
             self.active_timeout = 0
         for root_idx in range(nroots):  # init root
             self._roots.append(LRU(idle_timeout=self.idle_timeout))
-        self.idle_scan_period = 0.01
+        self.idle_scan_period = 0.001
         self.idle_scanning = True
         self.current_tick = 0
         self.current_root_idx = 0  # current updating to avoid collision
diff --git a/nfstream/cc/README.rst b/nfstream/cc/README.rst
deleted file mode 100644
index 8a0f1b3..0000000
--- a/nfstream/cc/README.rst
+++ /dev/null
@@ -1,8 +0,0 @@
-cc repository
--------------
-This repository contains headers C definitions for ABI cffi bindings.
-
-Currently:
-
-* libpcap_cc.py: a portable C/C++ library for network traffic capture.
-* libndpi_cc.py: Open and Extensible LGPLv3 Deep Packet Inspection Library.
\ No newline at end of file
diff --git a/nfstream/cc/__init__.py b/nfstream/cc/__init__.py
deleted file mode 100644
index 36432ba..0000000
--- a/nfstream/cc/__init__.py
+++ /dev/null
@@ -1,26 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-
-"""
-file: __init__.py
-This file is part of nfstream.
-
-Copyright (C) 2019 - Zied Aouini <aouinizied@gmail.com>
-
-nfstream is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License
-as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
-
-nfstream is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
-of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along with nfstream.
-If not, see <http://www.gnu.org/licenses/>.
-"""
-
-"""
-    cc module is c code definitions module for external libraries.
-"""
-
-__author__ = """Zied Aouini"""
-__email__ = 'aouinizied@gmail.com'
-__version__ = '1.2.1'
\ No newline at end of file
diff --git a/nfstream/cc/libndpi_cc.py b/nfstream/libndpi_cc.py
similarity index 100%
rename from nfstream/cc/libndpi_cc.py
rename to nfstream/libndpi_cc.py
diff --git a/nfstream/cc/libpcap_cc.py b/nfstream/libpcap_cc.py
similarity index 100%
rename from nfstream/cc/libpcap_cc.py
rename to nfstream/libpcap_cc.py
diff --git a/nfstream/ndpi.py b/nfstream/ndpi.py
index ef0e8ff..62da1c6 100644
--- a/nfstream/ndpi.py
+++ b/nfstream/ndpi.py
@@ -14,9 +14,9 @@ You should have received a copy of the GNU General Public License along with nfs
 If not, see <http://www.gnu.org/licenses/>.
 """
 
-from .cc.libndpi_cc import cc, cc_ndpi_network_headers, cc_ndpi_id_struct, cc_ndpi_flow_tcp_struct
-from .cc.libndpi_cc import cc_ndpi_flow_udp_struct, cc_ndpi_int_one_line_struct, cc_ndpi_packet_struct
-from .cc.libndpi_cc import cc_ndpi_packet_struct_stack, cc_ndpi_apis
+from .libndpi_cc import cc, cc_ndpi_network_headers, cc_ndpi_id_struct, cc_ndpi_flow_tcp_struct
+from .libndpi_cc import cc_ndpi_flow_udp_struct, cc_ndpi_int_one_line_struct, cc_ndpi_packet_struct
+from .libndpi_cc import cc_ndpi_packet_struct_stack, cc_ndpi_apis
 from os.path import abspath, dirname
 import cffi
 
diff --git a/nfstream/observer.py b/nfstream/observer.py
index 14ee2a2..df17a72 100644
--- a/nfstream/observer.py
+++ b/nfstream/observer.py
@@ -22,7 +22,7 @@ from enum import Enum, IntEnum
 from threading import Lock
 from select import select
 from cffi import FFI
-from .cc.libpcap_cc import cc, cc_packed
+from .libpcap_cc import cc, cc_packed
 import os.path
 import sys
 
diff --git a/nfstream/streamer.py b/nfstream/streamer.py
index fee6427..8de5157 100644
--- a/nfstream/streamer.py
+++ b/nfstream/streamer.py
@@ -54,7 +54,6 @@ class NFStreamer(object):
     def __iter__(self):
         try:
             self._producer.start()
-            tm.sleep(0.1)
             self._consumer.connect('ipc:///tmp/nfstream.pipe')
             while True:
                 try: