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Reduce CPU overhead by allowing components to disable their loop() (#9089)

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This commit is contained in:
J. Nick Koston
2025-06-18 11:49:25 +02:00
committed by GitHub
parent fedb54bb38
commit 2e534ce41e
28 changed files with 646 additions and 29 deletions
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28
esphome/core/application.h
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@@ -572,13 +572,41 @@ class Application {
void calculate_looping_components_();
// These methods are called by Component::disable_loop() and Component::enable_loop()
// Components should not call these directly - use this->disable_loop() or this->enable_loop()
// to ensure component state is properly updated along with the loop partition
void disable_component_loop_(Component *component);
void enable_component_loop_(Component *component);
void feed_wdt_arch_();
/// Perform a delay while also monitoring socket file descriptors for readiness
void yield_with_select_(uint32_t delay_ms);
std::vector<Component *> components_{};
// Partitioned vector design for looping components
// =================================================
// Components are partitioned into [active | inactive] sections:
//
// looping_components_: [A, B, C, D | E, F]
// ^
// looping_components_active_end_ (4)
//
// - Components A,B,C,D are active and will be called in loop()
// - Components E,F are inactive (disabled/failed) and won't be called
// - No flag checking needed during iteration - just loop 0 to active_end_
// - When a component is disabled, it's swapped with the last active component
// and active_end_ is decremented
// - When a component is enabled, it's swapped with the first inactive component
// and active_end_ is incremented
// - This eliminates branch mispredictions from flag checking in the hot loop
std::vector<Component *> looping_components_{};
uint16_t looping_components_active_end_{0};
// For safe reentrant modifications during iteration
uint16_t current_loop_index_{0};
bool in_loop_{false};
#ifdef USE_BINARY_SENSOR
std::vector<binary_sensor::BinarySensor *> binary_sensors_{};