2017년 1월 17일 화요일

Google protocol buffers


Protocol buffers are Google's language-neutral, platform-neutral, extensible mechanism for serializing structured data – think XML, but smaller, faster, and simpler. You define how you want your data to be structured once, then you can use special generated source code to easily write and read your structured data to and from a variety of data streams and using a variety of languages.

Protocol buffers are a flexible, efficient, automated mechanism for serializing structured data – think XML, but smaller, faster, and simpler. You define how you want your data to be structured once, then you can use special generated source code to easily write and read your structured data to and from a variety of data streams and using a variety of languages. You can even update your data structure without breaking deployed programs that are compiled against the "old" format.

Protocol buffers have many advantages over XML for serializing structured data. Protocol buffers:

  • are simpler
  • are 3 to 10 times smaller
  • are 20 to 100 times faster
  • are less ambiguous

generate data access classes that are easier to use programmatically

When this message is encoded to the protocol buffer binary format (the text format above is just a convenient human-readable representation for debugging and editing), it would probably be 28 bytes long and take around 100-200 nanoseconds to parse. The XML version is at least 69 bytes if you remove whitespace, and would take around 5,000-10,000 nanoseconds to parse.


Introducing proto3
Protocol Buffers language version 3 (aka proto3), as well as some new features in our existing language version (aka proto2). Proto3 simplifies the protocol buffer language, both for ease of use and to make it available in a wider range of programming languages: our current release lets you generate protocol buffer code in Java, C++, Python, Java Lite, Ruby, JavaScript, Objective-C, and C#. In addition you can generate proto3 code for Go using the latest Go protoc plugin, available from the golang/protobuf Github repository. More languages are in the pipeline.

-- from developers.google.com

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