Eliminate unnecessary allocation

native/src/widget/pane_grid.rs

@@ -757,16 +757,28 @@ pub fn draw<Renderer, T>(
         cursor_position
     };
 
-    // Render picked pane last
+    let mut render_picked_pane = None;
-    let mut elements = elements.zip(layout.children()).collect::<Vec<_>>();
-    elements
-        .sort_by_key(|((id, _), _)| picked_pane.map(|(id, _)| id) == Some(*id));
 
-    for ((id, pane), layout) in elements {
+    for ((id, pane), layout) in elements.zip(layout.children()) {
         match picked_pane {
             Some((dragging, origin)) if id == dragging => {
-                let bounds = layout.bounds();
+                render_picked_pane = Some((pane, origin, layout.bounds()));
+            }
+            _ => {
+                draw_pane(
+                    pane,
+                    renderer,
+                    default_style,
+                    layout,
+                    pane_cursor_position,
+                    viewport,
+                );
+            }
+        }
+    }
 
+    // Render picked pane last
+    if let Some((pane, origin, bounds)) = render_picked_pane {
         renderer.with_translation(
             cursor_position
                 - Point::new(bounds.x + origin.x, bounds.y + origin.y),
@@ -783,19 +795,7 @@ pub fn draw<Renderer, T>(
                 });
             },
         );
-            }
+    };
-            _ => {
-                draw_pane(
-                    pane,
-                    renderer,
-                    default_style,
-                    layout,
-                    pane_cursor_position,
-                    viewport,
-                );
-            }
-        }
-    }
 
     if let Some((axis, split_region, is_picked)) = picked_split {
         let highlight = if is_picked {