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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.h
+4 -2
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@@ -324,7 +324,7 @@ class APIConnection final : public APIServerConnectionBase {
void on_no_setup_connection();
// Function pointer type for type-erased message encoding
using MessageEncodeFn = void (*)(const void *, ProtoWriteBuffer &);
using MessageEncodeFn = uint8_t *(*) (const void *, ProtoWriteBuffer &PROTO_ENCODE_DEBUG_PARAM);
// Function pointer type for type-erased size calculation
using CalculateSizeFn = uint32_t (*)(const void *);
@@ -403,7 +403,9 @@ class APIConnection final : public APIServerConnectionBase {
}
// Shared no-op encode thunk for empty messages (ESTIMATED_SIZE == 0)
static void encode_msg_noop(const void *, ProtoWriteBuffer &) {}
static uint8_t *encode_msg_noop(const void *, ProtoWriteBuffer &buf PROTO_ENCODE_DEBUG_PARAM) {
return buf.get_pos();
}
// Non-template buffer management for send_message
bool send_message_(uint32_t payload_size, uint8_t message_type, MessageEncodeFn encode_fn, const void *msg);