Improve responsiveness when opening many files

src/celluloid-controller.c

@@ -1040,7 +1040,15 @@ metadata_cache_update_handler(CelluloidModel *model, gint64 pos, gpointer data)
 	GPtrArray *playlist = NULL;
 
 	g_object_get(G_OBJECT(model), "playlist", &playlist, NULL);
-	celluloid_view_update_playlist(view, playlist);
+
+    /* Update the playlist widget view only once, when 
+     * handling the final entry in the playlist. 
+     */
+    gint64 playlist_count = playlist ? playlist->len : 0;
+    if (pos == playlist_count - 1)
+    {
+	  celluloid_view_update_playlist(view, playlist);
+    }
 }
 
 static void

src/celluloid-player.c

@@ -657,15 +657,10 @@ load_file(CelluloidMpv *mpv, const gchar *uri, gboolean append)
 			->load_file(mpv, uri, append);
 	}
 
-	/* Playlist items added when mpv is idle doesn't get added directly to
-	 * its internal playlist, so the property change signal won't be fired.
-	 * We need to emit notify signal here manually to ensure that the
-	 * playlist widget gets updated.
-	 */
-	if(idle_active)
-	{
-		g_object_notify(G_OBJECT(player), "playlist");
-	}
+    /* The playlist will be notified when idle due to
+     * update_playlist(), when mpv_property_changed signals.
+     * The playlist view should not be regenerated for every loaded file.
+     */
 }
 
 static void