Use cPickle instead of pickle

iwla.py

@@ -24,7 +24,7 @@ import shutil
 import sys
 import re
 import time
-import pickle
+import cPickle
 import gzip
 import importlib 
 import argparse
@@ -248,7 +248,7 @@ class IWLA(object):
             os.makedirs(base)
 
         with open(filename + '.tmp', 'wb+') as f, self._openDB(filename, 'w') as fzip:
-            pickle.dump(obj, f)
+            cPickle.dump(obj, f)
             os.fsync(f)
             f.seek(0)
             fzip.write(f.read())
@@ -258,9 +258,10 @@ class IWLA(object):
         if not os.path.exists(filename):
             return None
 
+        res = None
         with self._openDB(filename) as f:
-            return pickle.load(f)
-        return None
+            res = cPickle.load(f)
+        return res
 
     def _callPlugins(self, target_root, *args):
         self.logger.info('==> Call plugins (%s)' % (target_root))