Best-legend-location microoptimization

oscargus · oscargus · commit f62d9093ee71 · 2023-12-15T07:40:53.000+01:00
diff --git a/lib/matplotlib/legend.py b/lib/matplotlib/legend.py
@@ -981,8 +981,7 @@ def _auto_legend_data(self):
             elif isinstance(artist, Collection):
                 transform, transOffset, hoffsets, _ = artist._prepare_points()
                 if len(hoffsets):
-                    for offset in transOffset.transform(hoffsets):
-                        offsets.append(offset)
+                    offsets.extend(offset for offset in transOffset.transform(hoffsets))
 
         return bboxes, lines, offsets
 
