Updated sensors and added empty logger for speedup

spatz/simulation.py

@@ -8,7 +8,7 @@ from spatz.dataset import Dataset
 from spatz.logger import Logger
 from spatz.sensors import Sensor
 from spatz.dataset import Dataset, Phase
-from spatz.logger import Logger
+from spatz.logger import Logger, EmptyLogger
 from spatz.sensors import Sensor
 from spatz.observer import Observer
 
@@ -84,7 +84,7 @@ class Simulation(Advanceable):
 
     def load(self, source: DataSource):
         self.__data_source = source
-        self.__logger = Logger()
+        self.__logger = EmptyLogger()
         
         for sensor in self.__sensors:
             sensor.set_dataset(self.__data_source)