Disable compute_test_value during Theano optimization phase. This give a better…

theano/compile/function_module.py

@@ -1475,6 +1475,7 @@ class FunctionMaker(object):
                     optimizer_profile = self.optimize_graph_with_cache(
                         optimizer, inputs, outputs)
                 else:
+                    with theano.configparser.change_flags(compute_test_value="off"):
                         optimizer_profile = optimizer(fgraph)
 
                 end_optimizer = time.time()