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Reduce Component memory usage by 40% (8 bytes per component)

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This commit is contained in:
J. Nick Koston 2025-06-30 21:15:20 -05:00
parent 7d4b11d112
commit adeceee71f
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1 changed files with 14 additions and 8 deletions
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22
esphome/core/component.cpp
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@ -20,8 +20,8 @@ static const char *const TAG = "component";
// - These are rarely accessed (setup only or error cases only)
// Component error messages - only stores messages for failed components
// Typically 0-2 entries, usually 0
static std::vector<std::pair<const Component *, const char *>> g_component_error_messages;
// Lazy allocated since most configs have zero failures
static std::unique_ptr<std::vector<std::pair<const Component *, const char *>>> g_component_error_messages;
// Setup priority overrides - freed after setup completes
// Typically < 5 entries, lazy allocated
@ -119,10 +119,12 @@ void Component::call_dump_config() {
if (this->is_failed()) {
// Look up error message from global vector
const char *error_msg = "unspecified";
for (const auto &pair : g_component_error_messages) {
if (pair.first == this) {
error_msg = pair.second;
break;
if (g_component_error_messages) {
for (const auto &pair : *g_component_error_messages) {
if (pair.first == this) {
error_msg = pair.second;
break;
}
}
}
ESP_LOGE(TAG, " Component %s is marked FAILED: %s", this->get_component_source(), error_msg);
@ -268,15 +270,19 @@ void Component::status_set_error(const char *message) {
App.app_state_ |= STATUS_LED_ERROR;
ESP_LOGE(TAG, "Component %s set Error flag: %s", this->get_component_source(), message);
if (strcmp(message, "unspecified") != 0) {
// Lazy allocate the error messages vector if needed
if (!g_component_error_messages) {
g_component_error_messages = std::make_unique<std::vector<std::pair<const Component *, const char *>>>();
}
// Check if this component already has an error message
for (auto &pair : g_component_error_messages) {
for (auto &pair : *g_component_error_messages) {
if (pair.first == this) {
pair.second = message;
return;
}
}
// Add new error message
g_component_error_messages.emplace_back(this, message);
g_component_error_messages->emplace_back(this, message);
}
}
void Component::status_clear_warning() {