3 from __future__ import division
11 for unit in ['bytes', 'KB', 'MB', 'GB', 'TB']:
13 return "%3.1f%s" % (num, unit)
16 total_raw_can_size = 0
17 total_raw_json_size = 0
18 total_raw_binary_size = 0
19 total_translated_json_size = 0
20 total_translated_binary_size = 0
22 for trace_file in sys.argv[1:]:
23 for line in open(trace_file):
25 json_message = json.loads(line)
29 del json_message['timestamp']
31 message = openxc_pb2.VehicleMessage()
33 if 'id' and 'data' in json_message:
34 # rough approx. that CAN messages are 10 bytes - they could be less
35 # but most of ours are full 64+11 bits
36 total_raw_can_size += 10
37 total_raw_json_size += len(json.dumps(json_message))
38 message.type = openxc_pb2.VehicleMessage.RAW
39 message.raw_message.message_id = json_message['id']
40 message.raw_message.data = int(json_message['data'], 0)
41 total_raw_binary_size += len(message.SerializeToString())
43 message.type = openxc_pb2.VehicleMessage.TRANSLATED
44 message.translated_message.name = json_message['name']
45 if 'event' in json_message:
46 message.translated_message.string_value = json_message['value']
47 if isinstance(json_message['event'], bool):
48 message.translated_message.type = openxc_pb2.TranslatedMessage.EVENTED_BOOL
49 message.translated_message.boolean_event = json_message['event']
50 elif isinstance(json_message['event'], numbers.Number):
51 message.translated_message.type = openxc_pb2.TranslatedMessage.EVENTED_NUM
52 message.translated_message.numeric_value = json_message['event']
54 message.translated_message.type = openxc_pb2.TranslatedMessage.EVENTED_STRING
55 message.translated_message.string_value = json_message['event']
57 if isinstance(json_message['value'], bool):
58 message.translated_message.type = openxc_pb2.TranslatedMessage.BOOL
59 message.translated_message.boolean_value = json_message['value']
60 elif isinstance(json_message['value'], numbers.Number):
61 message.translated_message.type = openxc_pb2.TranslatedMessage.NUM
62 message.translated_message.numeric_value = json_message['value']
64 message.translated_message.type = openxc_pb2.TranslatedMessage.STRING
65 message.translated_message.string_value = json_message['value']
66 total_translated_json_size += len(json.dumps(json_message))
67 total_translated_binary_size += len(message.SerializeToString())
70 print("For the %d trace files given..." % len(sys.argv[1:]))
71 print("Total transferred raw CAN size is %s" % sizeof_fmt(total_raw_can_size))
72 print("Total transferred raw JSON size is %s" % sizeof_fmt(total_raw_json_size))
73 print("Total transferred raw binary size is %s" % sizeof_fmt(total_raw_binary_size))
74 print("Total transferred translated JSON size is %s" %
75 sizeof_fmt(total_translated_json_size))
76 print("Total transferred translated binary size is %s" %
77 sizeof_fmt(total_translated_binary_size))
79 total_json_size = total_raw_json_size + total_translated_json_size
80 print("Total transferred JSON size is %s" % sizeof_fmt(total_json_size))
81 total_binary_size = total_raw_binary_size + total_translated_binary_size
82 print("Total transferred binary size is %s" % sizeof_fmt(total_binary_size))
84 if total_raw_can_size > 0:
85 print("Binary encoding adds %f%% overhead to raw CAN messages" % (
86 total_raw_binary_size / total_raw_can_size * 100 - 100))
87 print("JSON encoding adds %f%% overhead to raw CAN messages" % (
88 total_raw_json_size / total_raw_can_size * 100 - 100))
89 if total_raw_json_size > 0:
90 print("Binary encoding is %f%% smaller than JSON for raw messages" % (
91 100 - (total_raw_binary_size / total_raw_json_size * 100)))
92 if total_translated_json_size > 0:
93 print("Binary encoding is %f%% smaller than JSON for translated messages" % (
94 100 - (total_translated_binary_size / total_translated_json_size * 100)))
95 print("Binary encoding is %f%% smaller than JSON overall" % (
96 100 - (total_binary_size / total_json_size * 100)))