Added diagnostics to see how often the parameters have been set. Added a somewhat hacky way to avoid doing the parameter updates if not needed, using raw memory comparison.

Source/PS_Source/StretchSource.cpp

@@ -382,6 +382,8 @@ double StretchAudioSource::getInfileLengthSeconds()
 
 void StretchAudioSource::setRate(double rate)
 {
+	if (rate == m_playrate)
+		return;
 	std::lock_guard<std::mutex> locker(m_mutex);
 	//if (rate != m_lastplayrate)
 	{
@@ -394,16 +396,20 @@ void StretchAudioSource::setRate(double rate)
 			m_stretchers[i]->set_rap((float)rate);
 		}
 	}
+	++m_param_change_count;
 }
 
 void StretchAudioSource::setProcessParameters(ProcessParameters * pars)
 {
+	if (memcmp(pars, &m_ppar, sizeof(ProcessParameters)) == 0)
+		return;
 	std::lock_guard<std::mutex> locker(m_mutex);
 	m_ppar = *pars;
 	for (int i = 0; i < m_stretchers.size(); ++i)
 	{
 		m_stretchers[i]->set_parameters(pars);
 	}
+	++m_param_change_count;
 }
 
 ProcessParameters StretchAudioSource::getProcessParameters()

Source/PS_Source/StretchSource.h

@@ -91,6 +91,7 @@ public:
 	void setLoopingEnabled(bool b);
 	void setMaxLoops(int64_t numloops) { m_maxloops = numloops; }
 	void setAudioBufferAsInputSource(AudioBuffer<float>* buf, int sr, int len);
+	int m_param_change_count = 0;
 private:
 	CircularBuffer<float> m_stretchoutringbuf{ 1024 * 1024 };
 	AudioBuffer<float> m_file_inbuf;

Source/PluginEditor.cpp

@@ -96,7 +96,10 @@ void PaulstretchpluginAudioProcessorEditor::timerCallback(int id)
 			e->updateComponent();
 		if (processor.isRecordingEnabled() != m_rec_enable.getToggleState())
 			m_rec_enable.setToggleState(processor.isRecordingEnabled(), dontSendNotification);
-		m_info_label.setText(String(processor.getRecordingPositionPercent()*100.0, 1),dontSendNotification);
+		if (processor.isRecordingEnabled())
+			m_info_label.setText(String(processor.getRecordingPositionPercent()*100.0, 1),dontSendNotification);
+		else
+			m_info_label.setText(String(processor.m_control->getStretchAudioSource()->m_param_change_count), dontSendNotification);
 	}
 }