MNT: if the figure size is not changed, bail early

tacaswell · tacaswell · commit 01e261e9e5b7 · 2022-12-04T20:36:38.000-05:00
This avoids marking the figure as stale un-necessarily.

Also remove a local variable which is immediately replaced below.
diff --git a/lib/matplotlib/figure.py b/lib/matplotlib/figure.py
@@ -2954,6 +2954,8 @@ def set_size_inches(self, w, h=None, forward=True):
         if not np.isfinite(size).all() or (size < 0).any():
             raise ValueError(f'figure size must be positive finite not {size}')
         self.bbox_inches.p1 = size
+        if tuple(size) == (w, h) and not forward:
+            return
         if forward:
             manager = self.canvas.manager
             if manager is not None:
