Merge pull request matplotlib#31426 from MohitPal2005/fix-cursor-lag-26901

MohitPal2005 · web-flow · commit 36994e0dd9a0 · 2026-04-20T09:41:11.000-04:00
Fix: Optimize Cursor clearing on mouse exit to prevent lag
diff --git a/lib/matplotlib/widgets.py b/lib/matplotlib/widgets.py
@@ -2119,7 +2119,12 @@ def onmove(self, event):
             self.linev.set_visible(False)
             self.lineh.set_visible(False)
             if self.needclear:
-                self.canvas.draw()
+                background = self._load_blit_background()
+                if self.useblit and background is not None:
+                    self.canvas.restore_region(background)
+                    self.canvas.blit(self.ax.bbox)
+                else:
+                    self.canvas.draw()
                 self.needclear = False
             return
         self.needclear = True
