benchmark/proto/compare_sizes.py

   1 #!/usr/bin/env python
   2
   3 from __future__ import division
   4 import sys
   5 import numbers
   6
   7 import openxc_pb2
   8 import json
   9
  10 def sizeof_fmt(num):
  11     for unit in ['bytes', 'KB', 'MB', 'GB', 'TB']:
  12         if num < 1024.0:
  13             return "%3.1f%s" % (num, unit)
  14         num /= 1024.0
  15
  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
  21
  22 for trace_file in sys.argv[1:]:
  23     for line in open(trace_file):
  24         try:
  25             json_message = json.loads(line)
  26         except ValueError:
  27             continue
  28
  29         message = openxc_pb2.VehicleMessage()
  30
  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())
  42         else:
  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']
  51             else:
  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())
  57
  58
  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))
  67
  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))
  72
  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)))