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[api] Force inline encode_varint_raw_loop so pos stays in a register

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J. Nick Koston
2026-04-09 22:07:15 -10:00
parent 707f3f4749
commit 49ef5f9ad6
1 changed files with 2 additions and 1 deletions
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esphome/components/api/proto.h
+2 -1
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@@ -304,7 +304,8 @@ class ProtoEncode {
/// data-dependent back-edge branch, which measurably speeds up BLE raw
/// advertisement MAC encoding (always 7-byte varints) among other hot paths.
template<typename T>
static inline void encode_varint_raw_loop(uint8_t *__restrict__ &pos PROTO_ENCODE_DEBUG_PARAM, T value) {
static inline void ESPHOME_ALWAYS_INLINE encode_varint_raw_loop(uint8_t *__restrict__ &pos PROTO_ENCODE_DEBUG_PARAM,
T value) {
constexpr int MAX_VARINT_BYTES = (sizeof(T) * 8 + 6) / 7; // 5 for u32, 10 for u64
#pragma GCC unroll 10
for (int i = 0; i < MAX_VARINT_BYTES - 1; i++) {