implemented minor audio keyframing optimization

Since updating all input values per sample could be performance costly,
we now only update inputs that are either keyframing or connected to
another node

app/render/backend/audio/audioworker.cpp

@@ -49,8 +49,11 @@ void AudioWorker::RunNodeAccelerated(const Node *node, const TimeRange &range, c
           && param != node->ProcessesSamplesFrom()) {
         NodeInput* input = static_cast<NodeInput*>(param);
 
-        input_params.Insert(input, ProcessInput(input,
-                                                TimeRange(this_sample_time, this_sample_time)));
+        // If the input isn't keyframing, we don't need to update it unless it's connected, in which case it may change
+        if (input->IsConnected() || input->is_keyframing()) {
+          input_params.Insert(input, ProcessInput(input,
+                                                  TimeRange(this_sample_time, this_sample_time)));
+        }
       }
     }