From 4f5aacdb3a113819294e2fcb8c9700d6dc44a12d Mon Sep 17 00:00:00 2001 From: "J. Nick Koston" Date: Fri, 27 Jun 2025 01:25:26 +0200 Subject: [PATCH] Optimize SafeModeComponent memory layout to reduce padding (#9228) --- esphome/components/safe_mode/safe_mode.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/esphome/components/safe_mode/safe_mode.h b/esphome/components/safe_mode/safe_mode.h index 37e2c3a3d6..028b7b11cb 100644 --- a/esphome/components/safe_mode/safe_mode.h +++ b/esphome/components/safe_mode/safe_mode.h @@ -33,12 +33,15 @@ class SafeModeComponent : public Component { void write_rtc_(uint32_t val); uint32_t read_rtc_(); - bool boot_successful_{false}; ///< set to true after boot is considered successful + // Group all 4-byte aligned members together to avoid padding uint32_t safe_mode_boot_is_good_after_{60000}; ///< The amount of time after which the boot is considered successful uint32_t safe_mode_enable_time_{60000}; ///< The time safe mode should remain active for uint32_t safe_mode_rtc_value_{0}; uint32_t safe_mode_start_time_{0}; ///< stores when safe mode was enabled + // Group 1-byte members together to minimize padding + bool boot_successful_{false}; ///< set to true after boot is considered successful uint8_t safe_mode_num_attempts_{0}; + // Larger objects at the end ESPPreferenceObject rtc_; CallbackManager safe_mode_callback_{};