diff --git a/src/screens/CalendarScreen.tsx b/src/screens/CalendarScreen.tsx
index 8399c70..896710b 100644
--- a/src/screens/CalendarScreen.tsx
+++ b/src/screens/CalendarScreen.tsx
@@ -663,20 +663,25 @@ export default function CalendarScreen() {
                 <Text style={[s.stepLabel, { color: colors.textSub }]}>
                   {t('calPickName')} ({parsedSchedule.employees.length} trovati)
                 </Text>
-                <FlatList
-                  data={parsedSchedule.employees}
-                  keyExtractor={(_, i) => String(i)}
-                  style={{ maxHeight: 400 }}
-                  nestedScrollEnabled
-                  renderItem={({ item }) => (
-                    <TouchableOpacity
-                      style={[s.nameRow, { borderColor: colors.border }]}
-                      onPress={() => selectEmployee(item)}
-                    >
-                      <Text style={[s.nameText, { color: colors.text }]}>{item.name}</Text>
-                      <MaterialIcons name="chevron-right" size={20} color={colors.textSub} />
-                    </TouchableOpacity>
-                  )}
+                <FlatList
+                  data={parsedSchedule.employees}
+                  keyExtractor={(_, i) => String(i)}
+                  style={{ maxHeight: 400 }}
+                  nestedScrollEnabled
+                  renderItem={({ item }) => (
+                    <TouchableOpacity
+                      style={[s.nameRow, { borderColor: colors.border }]}
+                      onPress={() => selectEmployee(item)}
+                    >
+                      <Text style={[s.nameText, { color: colors.text }]}>{item.name}</Text>
+                      <MaterialIcons name="chevron-right" size={20} color={colors.textSub} />
+                    </TouchableOpacity>
+                  )}
+                  // Performance optimization: Virtualization props to reduce memory and render time for large lists
+                  initialNumToRender={15}
+                  maxToRenderPerBatch={10}
+                  windowSize={5}
+                  removeClippedSubviews={true}
                 />
               </>
             )}
diff --git a/src/screens/FlightScreen.tsx b/src/screens/FlightScreen.tsx
index e200b90..15d4489 100644
--- a/src/screens/FlightScreen.tsx
+++ b/src/screens/FlightScreen.tsx
@@ -923,6 +923,11 @@ export default function FlightScreen() {
           refreshControl={<RefreshControl refreshing={refreshing} onRefresh={() => { setRefreshing(true); fetchAll(); }} tintColor={colors.primary} />}
           ListEmptyComponent={<Text style={{ textAlign: 'center', marginTop: 40, color: '#9CA3AF', fontSize: 15 }}>{t('flightNoFlights')}</Text>}
           showsVerticalScrollIndicator={false}
+          // Performance optimization: Virtualization props to reduce memory and render time for large lists
+          initialNumToRender={15}
+          maxToRenderPerBatch={10}
+          windowSize={5}
+          removeClippedSubviews={true}
         />
       )}
 
diff --git a/src/screens/PasswordScreen.tsx b/src/screens/PasswordScreen.tsx
index a9611d8..1ae475d 100644
--- a/src/screens/PasswordScreen.tsx
+++ b/src/screens/PasswordScreen.tsx
@@ -323,6 +323,11 @@ export default function PasswordScreen() {
           </View>
         }
         showsVerticalScrollIndicator={false}
+        // Performance optimization: Virtualization props to reduce memory and render time for large lists
+        initialNumToRender={15}
+        maxToRenderPerBatch={10}
+        windowSize={5}
+        removeClippedSubviews={true}
       />
 
       {/* Add / Edit modal */}