Add Theano flag profiling.ignore_first_call

doc/library/config.txt

@@ -388,6 +388,14 @@ import theano and print the config variable, as in:
 
     Do a debugprint of the profiled functions
 
+.. attribute:: config.profiling.ignore_first_call
+
+    Bool value: either True or False
+
+    Default False
+
+    Do we ignore the first call to a Theano function while profiling.
+
 .. attribute:: config.lib.amdlibm
 
     Bool value: either True or False

theano/compile/function_module.py

@@ -928,7 +928,9 @@ class Function(object):
             profile.fct_call_time += dt_call
             if hasattr(self.fn, 'update_profile'):
                 self.fn.update_profile(profile)
-
+            if profile.ignore_first_call:
+                profile.reset()
+                profile.ignore_first_call = False
         if self.return_none:
             return None
         elif self.unpack_single and len(outputs) == 1:

theano/compile/profiling.py

@@ -110,7 +110,16 @@ class ProfileStats(object):
         in this class.
 
     """
-
+    def reset(self):
+        """ Ignore previous function call"""
+        #self.compile_time = 0.
+        self.fct_call_time = 0.
+        self.fct_callcount = 0
+        self.vm_call_time = 0.
+        self.apply_time = {}
+        self.apply_callcount = {}
+        # self.apply_cimpl = None
+        #self.messge = None
     #
     # Note on implementation:
     # Class variables are used here so that each one can be
@@ -216,6 +225,7 @@ class ProfileStats(object):
             if not _atexit_registered:
                 atexit.register(_atexit_print_fn)
                 _atexit_registered = True
+        self.ignore_first_call = theano.config.ignore_first_call
 
     def class_time(self):
         """

theano/configdefaults.py

@@ -1043,6 +1043,13 @@ AddConfigVar('profiling.debugprint',
              BoolParam(False),
              in_c_key=False)
 
+AddConfigVar('profiling.ignore_first_call',
+             """
+             Do we ignore the first call of a Theano function.
+             """,
+             BoolParam(False),
+             in_c_key=False)
+
 AddConfigVar('optdb.position_cutoff',
              'Where to stop eariler during optimization. It represent the'
              ' position of the optimizer where to stop.',