Micro optimize ControlObject::set() double vs double&

src/control/control.cpp

@@ -85,23 +85,22 @@ void ControlDoublePrivate::reset() {
     set(defaultValue, NULL);
 }
 
-void ControlDoublePrivate::set(const double& value, QObject* pSender) {
+void ControlDoublePrivate::set(double value, QObject* pSender) {
     if (m_bIgnoreNops && get() == value) {
         return;
     }
 
-    double dValue = value;
     // If the behavior says to ignore the set, ignore it.
     ControlNumericBehavior* pBehavior = m_pBehavior;
-    if (pBehavior && !pBehavior->setFilter(&dValue)) {
+    if (pBehavior && !pBehavior->setFilter(&value)) {
         return;
     }
-    m_value.setValue(dValue);
-    emit(valueChanged(dValue, pSender));
+    m_value.setValue(value);
+    emit(valueChanged(value, pSender));
 
     if (m_bTrack) {
         Stat::track(m_trackKey, static_cast<Stat::StatType>(m_trackType),
-                    static_cast<Stat::ComputeFlags>(m_trackFlags), dValue);
+                    static_cast<Stat::ComputeFlags>(m_trackFlags), value);
     }
 }
 

src/control/control.h

@@ -32,7 +32,7 @@ class ControlDoublePrivate : public QObject {
     }
 
     // Sets the control value.
-    void set(const double& value, QObject* pSender);
+    void set(double value, QObject* pSender);
     // Gets the control value.
     double get() const;
     // Resets the control value to its default.

src/controlobject.cpp

@@ -147,7 +147,7 @@ void ControlObject::reset() {
     }
 }
 
-void ControlObject::set(const double& value) {
+void ControlObject::set(double value) {
     if (m_pControl) {
         m_pControl->set(value, this);
     }

src/controlobject.h

@@ -55,7 +55,7 @@ class ControlObject : public QObject {
     // Instantly returns the value of the ControlObject
     static double get(const ConfigKey& key);
     // Sets the ControlObject value
-    void set(const double& value);
+    void set(double value);
     // Instantly sets the value of the ControlObject
     static void set(const ConfigKey& key, const double& value);
     // Sets the default value