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[api] Speed up protobuf encode 17-20% with register-optimized write path (#15290)

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Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>
This commit is contained in:
J. Nick Koston
2026-04-06 12:42:18 -10:00
committed by GitHub
co-authored by pre-commit-ci-lite[bot]
parent 5a14d6a4ad
commit 2b5ee69eb2
7 changed files with 1257 additions and 939 deletions
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esphome/components/api/api_connection.cpp
+2 -2
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@@ -1993,7 +1993,7 @@ bool APIConnection::send_message_(uint32_t payload_size, uint8_t message_type, M
size_t write_start = shared_buf.size();
shared_buf.resize(write_start + payload_size);
ProtoWriteBuffer buffer{&shared_buf, write_start};
encode_fn(msg, buffer);
encode_fn(msg, buffer PROTO_ENCODE_DEBUG_INIT(&shared_buf));
return this->send_buffer(ProtoWriteBuffer{&shared_buf}, message_type);
}
// Encodes a message to the buffer and returns the total number of bytes used,
@@ -2034,7 +2034,7 @@ uint16_t APIConnection::encode_to_buffer(uint32_t calculated_size, MessageEncode
shared_buf.resize(shared_buf.size() + to_add);
ProtoWriteBuffer buffer{&shared_buf, shared_buf.size() - calculated_size};
encode_fn(msg, buffer);
encode_fn(msg, buffer PROTO_ENCODE_DEBUG_INIT(&shared_buf));
// Return total size (header + payload + footer)
return static_cast<uint16_t>(total_calculated_size);