Protocol Buffers v21.8

Other

• Fix for grpc.tools #17995 & protobuf #7474 (handle UTF-8 paths in argumentfile) (#10721)

C++

• 21.x No longer define no_threadlocal on OpenBSD (#10743)

Java

• Mark default instance as immutable first to avoid race during static initialization of default instances (#10771)

Ruby

• Auto capitalize enums name in Ruby (#10454) (#10763)

Protocol Buffers v21.7

Java

• Refactoring java full runtime to reuse sub-message builders and prepare to
  migrate parsing logic from parse constructor to builder.
• Move proto wireformat parsing functionality from the private "parsing
  constructor" to the Builder class.
• Change the Lite runtime to prefer merging from the wireformat into mutable
  messages rather than building up a new immutable object before merging. This
  way results in fewer allocations and copy operations.
• Make message-type extensions merge from wire-format instead of building up
  instances and merging afterwards. This has much better performance.
• Fix TextFormat parser to build up recurring (but supposedly not repeated)
  sub-messages directly from text rather than building a new sub-message and
  merging the fully formed message into the existing field.
• This release addresses a Security Advisory for Java users

Protocol Buffers v3.20.3

Java

• Refactoring java full runtime to reuse sub-message builders and prepare to
  migrate parsing logic from parse constructor to builder.
• Move proto wireformat parsing functionality from the private "parsing
  constructor" to the Builder class.
• Change the Lite runtime to prefer merging from the wireformat into mutable
  messages rather than building up a new immutable object before merging. This
  way results in fewer allocations and copy operations.
• Make message-type extensions merge from wire-format instead of building up
  instances and merging afterwards. This has much better performance.
• Fix TextFormat parser to build up recurring (but supposedly not repeated)
  sub-messages directly from text rather than building a new sub-message and
  merging the fully formed message into the existing field.
• This release addresses a Security Advisory for Java users

Protocol Buffers v3.19.6

Java

• Refactoring java full runtime to reuse sub-message builders and prepare to
  migrate parsing logic from parse constructor to builder.
• Move proto wireformat parsing functionality from the private "parsing
  constructor" to the Builder class.
• Change the Lite runtime to prefer merging from the wireformat into mutable
  messages rather than building up a new immutable object before merging. This
  way results in fewer allocations and copy operations.
• Make message-type extensions merge from wire-format instead of building up
  instances and merging afterwards. This has much better performance.
• Fix TextFormat parser to build up recurring (but supposedly not repeated)
  sub-messages directly from text rather than building a new sub-message and
  merging the fully formed message into the existing field.
• This release addresses a Security Advisory for Java users

Protobuf Release v3.16.3

Java

• Refactoring java full runtime to reuse sub-message builders and prepare to
  migrate parsing logic from parse constructor to builder.
• Move proto wireformat parsing functionality from the private "parsing
  constructor" to the Builder class.
• Change the Lite runtime to prefer merging from the wireformat into mutable
  messages rather than building up a new immutable object before merging. This
  way results in fewer allocations and copy operations.
• Make message-type extensions merge from wire-format instead of building up
  instances and merging afterwards. This has much better performance.
• Fix TextFormat parser to build up recurring (but supposedly not repeated)
  sub-messages directly from text rather than building a new sub-message and
  merging the fully formed message into the existing field.
• This release addresses a Security Advisory for Java users

Protocol Buffers v21.6

C++

• Reduce memory consumption of MessageSet parsing
• This release addresses a Security Advisory for C++ and Python users

Protocol Buffers v3.20.2

C++

• Reduce memory consumption of MessageSet parsing
• This release addresses a Security Advisory for C++ and Python users

Protocol Buffers v3.19.5

C++

• Reduce memory consumption of MessageSet parsing
• This release addresses a Security Advisory for C++ and Python users

Protocol Buffers v3.18.3

C++

• Reduce memory consumption of MessageSet parsing
• This release addresses a Security Advisory for C++ and Python users

Protocol Buffers v21.5

PHP

• Added getContainingOneof and getRealContainingOneof to descriptor.
• fix PHP readonly legacy files for nested messages

Python

• Fixed comparison of maps in Python.