Try to speed up tab switching

app/playlists.py

@@ -34,6 +34,7 @@ from PyQt6.QtWidgets import (
 )
 
 # Third party imports
+import line_profiler
 
 # App imports
 from audacity_controller import AudacityController
@@ -830,14 +831,12 @@ class PlaylistTab(QTableView):
 
         # Use a set to deduplicate result (a selected row will have all
         # items in that row selected)
-        result = sorted(
-            list(
-                set([self.model().mapToSource(a).row() for a in self.selectedIndexes()])
-            )
-        )
+        selected_indexes = self.selectedIndexes()
 
-        log.debug(f"get_selected_rows() returned: {result=}")
-        return result
+        if not selected_indexes:
+            return []
+
+        return sorted(list(set([self.model().mapToSource(a).row() for a in selected_indexes])))
 
     def get_top_visible_row(self) -> int:
         """
@@ -1119,6 +1118,7 @@ class PlaylistTab(QTableView):
 
         self.setSpan(row, column, rowSpan, columnSpan)
 
+    @line_profiler.profile
     def tab_live(self) -> None:
         """
         Called when tab gets focus