diff options
Diffstat (limited to 'libs/openxc-message-format/benchmark/proto/compare_sizes.py')
| -rwxr-xr-x | libs/openxc-message-format/benchmark/proto/compare_sizes.py | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/libs/openxc-message-format/benchmark/proto/compare_sizes.py b/libs/openxc-message-format/benchmark/proto/compare_sizes.py new file mode 100755 index 00000000..0ed445fd --- /dev/null +++ b/libs/openxc-message-format/benchmark/proto/compare_sizes.py @@ -0,0 +1,96 @@ +#!/usr/bin/env python + +from __future__ import division +import sys +import numbers + +import openxc_pb2 +import json + +def sizeof_fmt(num): + for unit in ['bytes', 'KB', 'MB', 'GB', 'TB']: + if num < 1024.0: + return "%3.1f%s" % (num, unit) + num /= 1024.0 + +total_raw_can_size = 0 +total_raw_json_size = 0 +total_raw_binary_size = 0 +total_translated_json_size = 0 +total_translated_binary_size = 0 + +for trace_file in sys.argv[1:]: + for line in open(trace_file): + try: + json_message = json.loads(line) + except ValueError: + continue + + del json_message['timestamp'] + + message = openxc_pb2.VehicleMessage() + + if 'id' and 'data' in json_message: + # rough approx. that CAN messages are 10 bytes - they could be less + # but most of ours are full 64+11 bits + total_raw_can_size += 10 + total_raw_json_size += len(json.dumps(json_message)) + message.type = openxc_pb2.VehicleMessage.RAW + message.raw_message.message_id = json_message['id'] + message.raw_message.data = int(json_message['data'], 0) + total_raw_binary_size += len(message.SerializeToString()) + else: + message.type = openxc_pb2.VehicleMessage.TRANSLATED + message.translated_message.name = json_message['name'] + if 'event' in json_message: + message.translated_message.string_value = json_message['value'] + if isinstance(json_message['event'], bool): + message.translated_message.type = openxc_pb2.TranslatedMessage.EVENTED_BOOL + message.translated_message.boolean_event = json_message['event'] + elif isinstance(json_message['event'], numbers.Number): + message.translated_message.type = openxc_pb2.TranslatedMessage.EVENTED_NUM + message.translated_message.numeric_value = json_message['event'] + else: + message.translated_message.type = openxc_pb2.TranslatedMessage.EVENTED_STRING + message.translated_message.string_value = json_message['event'] + else: + if isinstance(json_message['value'], bool): + message.translated_message.type = openxc_pb2.TranslatedMessage.BOOL + message.translated_message.boolean_value = json_message['value'] + elif isinstance(json_message['value'], numbers.Number): + message.translated_message.type = openxc_pb2.TranslatedMessage.NUM + message.translated_message.numeric_value = json_message['value'] + else: + message.translated_message.type = openxc_pb2.TranslatedMessage.STRING + message.translated_message.string_value = json_message['value'] + total_translated_json_size += len(json.dumps(json_message)) + total_translated_binary_size += len(message.SerializeToString()) + + +print("For the %d trace files given..." % len(sys.argv[1:])) +print("Total transferred raw CAN size is %s" % sizeof_fmt(total_raw_can_size)) +print("Total transferred raw JSON size is %s" % sizeof_fmt(total_raw_json_size)) +print("Total transferred raw binary size is %s" % sizeof_fmt(total_raw_binary_size)) +print("Total transferred translated JSON size is %s" % + sizeof_fmt(total_translated_json_size)) +print("Total transferred translated binary size is %s" % + sizeof_fmt(total_translated_binary_size)) + +total_json_size = total_raw_json_size + total_translated_json_size +print("Total transferred JSON size is %s" % sizeof_fmt(total_json_size)) +total_binary_size = total_raw_binary_size + total_translated_binary_size +print("Total transferred binary size is %s" % sizeof_fmt(total_binary_size)) + +if total_raw_can_size > 0: + print("Binary encoding adds %f%% overhead to raw CAN messages" % ( + total_raw_binary_size / total_raw_can_size * 100 - 100)) + print("JSON encoding adds %f%% overhead to raw CAN messages" % ( + total_raw_json_size / total_raw_can_size * 100 - 100)) +if total_raw_json_size > 0: + print("Binary encoding is %f%% smaller than JSON for raw messages" % ( + 100 - (total_raw_binary_size / total_raw_json_size * 100))) +if total_translated_json_size > 0: + print("Binary encoding is %f%% smaller than JSON for translated messages" % ( + 100 - (total_translated_binary_size / total_translated_json_size * 100))) +print("Binary encoding is %f%% smaller than JSON overall" % ( + 100 - (total_binary_size / total_json_size * 100))) |