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 if isinstance(json_message['value'], bool):
44 message.type = openxc_pb2.VehicleMessage.BOOL
45 message.boolean_message.name = json_message['name']
46 message.boolean_message.value = json_message['value']
47 elif isinstance(json_message['value'], numbers.Number):
48 message.type = openxc_pb2.VehicleMessage.NUM
49 message.numerical_message.name = json_message['name']
50 message.numerical_message.value = json_message['value']
52 message.type = openxc_pb2.VehicleMessage.STRING
53 message.string_message.name = json_message['name']
54 message.string_message.value = json_message['value']
55 total_translated_json_size += len(line)
56 total_translated_binary_size += len(message.SerializeToString())
59 print("For the %d trace files given..." % len(sys.argv[1:]))
60 print("Total transferred raw CAN size is %s" % sizeof_fmt(total_raw_can_size))
61 print("Total transferred raw JSON size is %s" % sizeof_fmt(total_raw_json_size))
62 print("Total transferred raw binary size is %s" % sizeof_fmt(total_raw_binary_size))
63 print("Total transferred translated JSON size is %s" %
64 sizeof_fmt(total_translated_json_size))
65 print("Total transferred translated binary size is %s" %
66 sizeof_fmt(total_translated_binary_size))
68 total_json_size = total_raw_json_size + total_translated_json_size
69 print("Total transferred JSON size is %s" % sizeof_fmt(total_json_size))
70 total_binary_size = total_raw_binary_size + total_translated_binary_size
71 print("Total transferred binary size is %s" % sizeof_fmt(total_binary_size))
73 if total_raw_can_size > 0:
74 print("Binary encoding adds %f%% overhead to raw CAN messages" % (
75 total_raw_binary_size / total_raw_can_size * 100 - 100))
76 print("JSON encoding adds %f%% overhead to raw CAN messages" % (
77 total_raw_json_size / total_raw_can_size * 100 - 100))
78 if total_raw_json_size > 0:
79 print("Binary encoding is %f%% smaller than JSON for raw messages" % (
80 100 - (total_raw_binary_size / total_raw_json_size * 100)))
81 if total_translated_json_size > 0:
82 print("Binary encoding is %f%% smaller than JSON for translated messages" % (
83 100 - (total_translated_binary_size / total_translated_json_size * 100)))
84 print("Binary encoding is %f%% smaller than JSON overall" % (
85 100 - (total_binary_size / total_json_size * 100)))