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 message = openxc_pb2.VehicleMessage()
31 if 'id' and 'data' in json_message:
32 # rough approx. that CAN messages are 10 bytes - they could be less
33 # but most of ours are full 64+11 bits
34 total_raw_can_size += 10
35 total_raw_json_size += len(line)
36 binary_message = openxc_pb2.RawMessage()
37 binary_message.message_id = json_message['id']
38 binary_message.data = int(json_message['data'], 0)
39 message.type = openxc_pb2.VehicleMessage.RAW
40 message.raw_message = binary_message
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 isinstance(json_message['value'], bool):
46 message.translated_message.boolean_value = json_message['value']
47 elif isinstance(json_message['value'], numbers.Number):
48 message.translated_message.numerical_value = json_message['value']
50 message.translated_message.string_value = json_message['value']
51 total_translated_json_size += len(line)
52 total_translated_binary_size += len(message.SerializeToString())
55 print("For the %d trace files given..." % len(sys.argv[1:]))
56 print("Total transferred raw CAN size is %s" % sizeof_fmt(total_raw_can_size))
57 print("Total transferred raw JSON size is %s" % sizeof_fmt(total_raw_json_size))
58 print("Total transferred raw binary size is %s" % sizeof_fmt(total_raw_binary_size))
59 print("Total transferred translated JSON size is %s" %
60 sizeof_fmt(total_translated_json_size))
61 print("Total transferred translated binary size is %s" %
62 sizeof_fmt(total_translated_binary_size))
64 total_json_size = total_raw_json_size + total_translated_json_size
65 print("Total transferred JSON size is %s" % sizeof_fmt(total_json_size))
66 total_binary_size = total_raw_binary_size + total_translated_binary_size
67 print("Total transferred binary size is %s" % sizeof_fmt(total_binary_size))
69 if total_raw_can_size > 0:
70 print("Binary encoding adds %f%% overhead to raw CAN messages" % (
71 total_raw_binary_size / total_raw_can_size * 100 - 100))
72 print("JSON encoding adds %f%% overhead to raw CAN messages" % (
73 total_raw_json_size / total_raw_can_size * 100 - 100))
74 if total_raw_json_size > 0:
75 print("Binary encoding is %f%% smaller than JSON for raw messages" % (
76 100 - (total_raw_binary_size / total_raw_json_size * 100)))
77 if total_translated_json_size > 0:
78 print("Binary encoding is %f%% smaller than JSON for translated messages" % (
79 100 - (total_translated_binary_size / total_translated_json_size * 100)))
80 print("Binary encoding is %f%% smaller than JSON overall" % (
81 100 - (total_binary_size / total_json_size * 100)))