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[api] Exclude ESP8266 from NATIVE_LITTLE_ENDIAN optimization

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ESP8266's older Arduino GCC doesn't optimize small memcpy into single
load/store instructions, making the memcpy path 16 bytes larger than
byte-at-a-time on that platform.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
J. Nick Koston
2026-03-08 12:00:51 -10:00
co-authored by Claude Opus 4.6
parent aacbb6659e
commit 6c7e052049
1 changed files with 4 additions and 1 deletions
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esphome/components/api/__init__.py
+4 -1
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@@ -456,7 +456,10 @@ async def to_code(config: ConfigType) -> None:
# libsodium uses NATIVE_LITTLE_ENDIAN to enable optimized 32-bit
# load/store via memcpy instead of byte-at-a-time operations in
# poly1305 and chacha20. All ESPHome targets are little-endian.
cg.add_build_flag("-DNATIVE_LITTLE_ENDIAN")
# ESP8266 excluded: its older GCC doesn't optimize memcpy into
# a single load, making the memcpy path 16 bytes larger.
if not CORE.is_esp8266:
cg.add_build_flag("-DNATIVE_LITTLE_ENDIAN")
cg.add_library("esphome/noise-c", "0.1.10")
else:
cg.add_define("USE_API_PLAINTEXT")