prediction: make mixx loading a little more efficient

src/prediction/mod.rs

@@ -189,7 +189,7 @@ impl Conversation {
             archive: self.archive.lock().await.clone(),
             tokens_consumed: self.tokens_consumed
         };
-        save_data.save();
+        save_data.save().unwrap();
 
         let next_scene = Scene::new(
             save_data.tokens_consumed,
@@ -218,15 +218,17 @@ impl Conversation {
                     Err(err) => log::info!("Failed to load mixxx playlist: {:?}.", err),
                     Ok(playlist) => {
                         self.current_playlist = vec![];
+                        let mut archive = self.archive.lock().await;
                         for item in playlist.clone() {
-                            if let Contents::Track(as_track) = item.contents() {
+                            let artifact_ref = archive.insert(item);
+                            if let Contents::Track(as_track) = artifact_ref.contents() {
                                 self.current_playlist.push(as_track.clone());
                             }
-                            self.archive.lock().await.insert(item);
                         }
                         self.direction.playlist = args.playlist_name;
                         log::info!("Mixxx playlist reloaded.");
 
+                        drop(archive);
                         self.refresh().await;
                     }
                 }