Update on the perf tests

Author: vchimev

core/device/device.py

@@ -358,8 +358,8 @@ def is_running(device_id, app_id):
     def wait_until_app_is_running(device_id, app_id, timeout=60):
         """
         Wait until app is running.
-        :param app_id: Bundle identifier (example: org.nativescript.TestApp)
         :param device_id: Device identifier.
+        :param app_id: Bundle identifier (example: org.nativescript.TestApp)
         :param timeout: Timeout in seconds.
         """
         end_time = time.time() + timeout

tests/perf/start_time.py

@@ -67,6 +67,7 @@ def base_test(self, apk_name, app_id):
         Device.start_app(device_id=self.device_id, app_id=app_id)
 
         time.sleep(10)
+        Device.wait_until_app_is_running(device_id=self.device_id, app_id=app_id, timeout=10)
         start_time = Device.get_start_time(self.device_id, app_id=app_id)
 
         tmp_csv_file_path = "./tmp-" + apk_name + self.csv_ext