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ab233e6d83
- Cache UART selection at setup time so each loop iteration no longer dereferences global_logger and pays for a non-inlined Logger::get_uart() call before the read switch. - Use App.get_loop_component_start_time() once per loop instead of two millis() calls (especially relevant on ESP8266 where millis() involves interrupt-locked 64-bit timer access). - Move read_byte_() to the header as ESPHOME_ALWAYS_INLINE so the call/ret pair and optional<uint8_t> staging are elided at the call sites in loop().
