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Kamil Monicz e090f8ae77 Serialize length-prefixed protos once (#27252) 
Avoid calling ByteSize() separately in serialize_length_prefixed(). The serialized payload already carries the exact length to prefix, so this keeps behavior intact while avoiding a duplicate serialization-sized pass.

Closes #27252

COPYBARA_INTEGRATE_REVIEW=https://github.com/protocolbuffers/protobuf/pull/27252 from Zaczero:python-serialize-length-prefixed-once 8a4f60b4c7
PiperOrigin-RevId: 923539199
2026-05-29 12:19:19 -07:00
..
import_test_package Shorten our license headers into an abbreviated form that references LICENSE instead of including it in full. 2023-09-08 17:49:49 -07:00
numpy Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
__init__.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
any_test.py Add constructing unpack routine to Python Protobuf Any API. 2025-02-27 16:44:02 -08:00
api_implementation.cc Tag the api_implementation Python extension module as Python 3.13 no-GIL compatible. 2025-10-28 18:48:41 -07:00
api_implementation.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
builder.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
containers.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
decoder.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
decoder_test.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
descriptor_database_test.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
descriptor_pool_test.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
descriptor_pool_test1.proto Fix minor typos (#17682) 2024-09-20 20:50:06 -07:00
descriptor_pool_test2.proto Shorten our license headers into an abbreviated form that references LICENSE instead of including it in full. 2023-09-08 18:50:27 -07:00
descriptor_test.py [py/upb] Make GetOptions() return immutable options for scalar type. UPB will raise a TypeError when options returned GetOptions() by is mutated. 2026-05-20 11:33:26 -07:00
duration_test.py Breaking change: raise TypeError when convert non-timedelta to Duration, or convert non-datetime to Timestamp in python proto. (Original code may raise ArributeError) 2025-10-27 20:22:37 -07:00
encoder.py Improve serialization performance in the case of recursive maps in pure Python Protobuf. 2026-05-05 13:45:18 -07:00
enum_type_wrapper.py Create an enum_type_wrapper.pyi stub with DESCRIPTOR: EnumDescriptor 2026-05-12 06:14:01 -07:00
extension_dict.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
factory_test1.proto On demand create message meta class for upb python 2023-09-15 11:34:38 -07:00
factory_test2.proto Automated rollback of commit 4af0b887a5. 2025-11-14 13:18:18 -08:00
field_mask.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
field_mask_test.py Change field_mask.py to avoid recursion 2026-03-25 05:26:34 -07:00
file_options_test.proto Shorten our license headers into an abbreviated form that references LICENSE instead of including it in full. 2023-09-08 18:50:27 -07:00
generator_test.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
import_test.py Add python tests for import option 2025-09-02 16:20:53 -07:00
json_format_test.py json/python: add support for custom json strings for enum values 2026-05-28 06:17:20 -07:00
keywords_test.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
message_benchmark.py Add assign_bytes Benchmarks. 2026-05-22 14:36:41 -07:00
message_factory_test.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
message_listener.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
message_set_extensions.proto Add recursion guards for the following nested messages: 2026-02-11 15:13:37 -08:00
message_test.py Remove possible use after free via Python Buffer Objects in MergeFromString. 2026-05-26 14:27:25 -07:00
missing_enum_values.proto Shorten our license headers into an abbreviated form that references LICENSE instead of including it in full. 2023-09-08 18:50:27 -07:00
more_extensions.proto Shorten our license headers into an abbreviated form that references LICENSE instead of including it in full. 2023-09-08 18:50:27 -07:00
more_extensions_dynamic.proto Shorten our license headers into an abbreviated form that references LICENSE instead of including it in full. 2023-09-08 18:50:27 -07:00
more_messages.proto Fixed a bug in msg.MergeFrom(msg2) in Python. 2026-03-12 14:04:14 -07:00
no_package.proto Shorten our license headers into an abbreviated form that references LICENSE instead of including it in full. 2023-09-08 18:50:27 -07:00
packed_field_test.proto Shorten our license headers into an abbreviated form that references LICENSE instead of including it in full. 2023-09-08 18:50:27 -07:00
proto_api_test.py Two new functions in PyProto_API to manage DescriptorPools 2025-12-10 03:52:15 -08:00
proto_api_test_ext.cc Add missing upb_XXXDef_FindXXXByNameWithSize functions and index methods by name 2026-03-04 07:06:24 -08:00
proto_builder_test.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
proto_json_test.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
proto_test.py Serialize length-prefixed protos once (#27252) 2026-05-29 12:19:19 -07:00
proto_text_test.py Nextgen Proto Pythonic API: “Add-on” proto for Text Format serialize/parse 2025-01-09 18:02:40 -08:00
pybind11_test_module.cc Fix stack overflow on self-recursive messages with pybind11 2024-06-12 02:35:05 -07:00
python_edition_defaults.py.template Implement Editions in Pure Python. 2023-11-07 14:40:26 -08:00
python_message.py Improve serialization performance in the case of recursive maps in pure Python Protobuf. 2026-05-05 13:45:18 -07:00
python_protobuf.cc Automated Code Change 2025-03-30 20:54:41 -07:00
recursive_message_pybind11_test.py Fix stack overflow on self-recursive messages with pybind11 2024-06-12 02:35:05 -07:00
reflection_cpp_test.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
reflection_test.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
runtime_version_test.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
self_recursive.proto Add recursion depth limits to pure python 2025-05-13 14:45:52 -07:00
self_recursive_from_py.proto Fix stack overflow on self-recursive messages with pybind11 2024-06-12 02:35:05 -07:00
service_reflection_test.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
symbol_database_test.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
test_bad_identifiers.proto Shorten our license headers into an abbreviated form that references LICENSE instead of including it in full. 2023-09-08 18:50:27 -07:00
test_proto2.proto Fix pyi generation for messages with a field named "self" 2024-10-03 07:44:03 -07:00
test_proto3_optional.proto Add new including_default_value_without_presence_fields to Python JSON serializer. 2024-01-31 14:16:54 -08:00
test_util.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
testing_refleaks.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
text_encoding_test.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
text_format_test.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
thread_safe_test.py Fixed race in GetMessageClass/RegisterMessageClass under free threading. 2026-05-08 10:47:54 -07:00
timestamp_test.py Breaking change: raise TypeError when convert non-timedelta to Duration, or convert non-datetime to Timestamp in python proto. (Original code may raise ArributeError) 2025-10-27 20:22:37 -07:00
type_checkers.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
unknown_fields_test.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
well_known_types.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
well_known_types_test.proto Add construction support for repeated Timestamp/Duration/Struct/ListValue. 2025-09-08 11:47:20 -07:00
well_known_types_test.py Improve serialization performance in the case of recursive maps in pure Python Protobuf. 2026-05-05 13:45:18 -07:00
wire_format.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00
wire_format_test.py Auto-format Py Proto python files. 2026-04-29 13:40:58 -07:00