From 5665a3dd89c5e67bfefc4c9401238b9c62c7964b Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Fri, 13 Mar 2026 14:24:12 +0000
Subject: [PATCH] Optimize performance by caching millis() in ABounce::update()

- Modified ABounce::debounce() to accept a 'now' timestamp.
- Updated ABounce::update() to call millis() once and reuse the value.
- Improved timing consistency and reduced function call overhead.

Co-authored-by: prestalab <2825421+prestalab@users.noreply.github.com>
---
 ABounce.cpp | 13 +++++++------
 ABounce.h   |  2 +-
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/ABounce.cpp b/ABounce.cpp
index b763225..c33db7e 100644
--- a/ABounce.cpp
+++ b/ABounce.cpp
@@ -52,15 +52,16 @@ void ABounce::rebounce(unsigned long interval)
 
 int ABounce::update()
 {
-	if ( debounce() ) {
+	unsigned long now = millis();
+	if ( debounce(now) ) {
         rebounce(0);
         return stateChanged = 1;
     }
 
      // We need to rebounce, so simulate a state change
      
-	if ( rebounce_millis && (millis() - previous_millis >= rebounce_millis) ) {
-        previous_millis = millis();
+	if ( rebounce_millis && (now - previous_millis >= rebounce_millis) ) {
+        previous_millis = now;
 		 rebounce(0);
 		 return stateChanged = 1;
 	}
@@ -82,12 +83,12 @@ int ABounce::read()
 
 
 // Protected: debounces the pin
-int ABounce::debounce() {
+int ABounce::debounce(unsigned long now) {
 	
 	uint8_t newState = getButton(analogRead(pin));
 	if (state != newState ) {
-  		if (millis() - previous_millis >= interval_millis) {
-  			previous_millis = millis();
+		if (now - previous_millis >= interval_millis) {
+			previous_millis = now;
   			state = newState;
   			return 1;
 	}
diff --git a/ABounce.h b/ABounce.h
index fd86410..66b8b13 100644
--- a/ABounce.h
+++ b/ABounce.h
@@ -66,7 +66,7 @@ class ABounce
 	bool fallingEdge();
   
 protected:
-  int debounce();
+  int debounce(unsigned long now);
   int getButton(int buttonValue); 
   unsigned long  previous_millis, interval_millis, rebounce_millis;
   uint8_t state;