C++
- Use std::atomic in case of myriad2 platform
- Always declare enums to be int-sized
- Added DebugString() and ShortDebugString() methods on MessageLite
- Specialized different parse loop control flows
- Make hasbits potentially in register. The or's start forming an obstacle because it's a read modify store on the same mem address on each iteration.
- Move to an internal MACRO for parser validity checks.
- Improve map parsing performance.
- Make MergePartialFromCodedStream non virtual. This allows direct calls, potential inlining and is also a code health improvement
- Add an overall limit to parse_context to prevent reading past it. This allows to remove a annoying level of indirection.
- Fix a mistake, we shouldn't verify map key/value strings for utf8 in opt mode for proto2.
- Further improvements to cut binary size.
- Prepare to make MergePartialFromCodedStream non-virtual.
- A report on some interesting behavior change in python (caused by b/27494216) made me realize there is a check that needs to be done in case the parse ended on a end group tag.
- Add a note of caution to the comments around skip in CodedOutputStream.
- Simplify end check.
- Add overload for ParseMessage for MessageLite/Message types. If the explicit type is not known inlining won't help de-virtualizing the virtual call.
- Reduce linker input. It turns out that ParseMessage is not inlined, producing template instantiations that are used only once and save nothing but cost more.
- Improve the parser.
- [c++17] Changed proto2::RepeatedPtrField iterators to no longer derive from the deprecated std::iterator class.
- Change the default value of case_insensitive_enum_parsing to false for JsonStringToMessage.
- Add a warning if a field name doesn't match the style guide.
- Fix TextFormat not round-trip correctly when float value is max float.
- Added locationed info for some errors at compiler
- Python reserved keywords are now working with getattr()/setattr() for most descriptors.
- Added AllowUnknownField() in text_format
- Append '_' to C++ reserved keywords for message, enum, extension
- Fix MSVC warning C4244 in protobuf's parse_context.h.
- Updating Iterators to be compatible with C++17 in MSVC.
- Use capability annotation in mutex.h
- Fix "UndefinedBehaviorSanitizer: cfi-bad-type"
- CriticalSectionLock class as a lightweight replacement for std::mutex on Windows platforms.
- Removed vestigial wire_format_lite_inl.h
C#
- Added System.Memory dependency.
Java
- Make Java protoc code generator ignore optimize_for LITE_RUNTIME. Users should instead use the Java lite protoc plugin.
- Change Extension getMessageDefaultInstance() to return Message instead of MessageLite.
- Prevent malicious input streams from leaking buffers for ByteString or ByteBuffer parsing.
- Release new Javalite runtime.
- Show warning in case potential file name conflict.
- Allow Java reserved keywords to be used in extensions.
- Added setAllowUnknownFields() in text format
- Add memoization to ExtensionRegistryLite.getEmptyRegistry()
- Improve performance of CodedOutputStream.writeUInt32NoTag
- Add an optimized mismatch-finding algorithm to UnsafeUtil.
- When serializing uint32 varints, check that we have MAX_VARINT32_SIZE bytes left, not just MAX_VARINT_SIZE.
- Minor optimization to RopeByteString.PieceIterator
JavaScript
- Simplify generated toObject code when the default value is used.
Python
- Changes implementation of Name() for enums that allow aliases in proto2 in Python to be in line with claims in C++ implementation (to return first value).
- Added double_format option in text format printer.
- Added iter and contains to extension dict
- Added allow_unknown_field option in python text format parser
- Fixed Timestamp.ToDatetime() loses precision issue
- Support unknown field in text format printer.
- Float field will be convert to inf if bigger than struct.unpack('f', b'\xff\xff\x7f\x7f')[0] which is about 3.4028234664e+38,
convert to -inf if smaller than -3.4028234664e+38 - Allowed casting str->bytes in Message.setstate
Ruby
- Helper methods to get enum name for Ruby.