matplotlib
diff --git a/‎lib/matplotlib/mathtext.py
Copy file name to clipboardExpand all lines: lib/matplotlib/mathtext.py
+8-23Lines changed: 8 additions & 23 deletions b/‎lib/matplotlib/mathtext.py
Copy file name to clipboardExpand all lines: lib/matplotlib/mathtext.py
+8-23Lines changed: 8 additions & 23 deletions
@@ -1027,39 +1027,24 @@ def _map_virtual_font(self, fontname, font_class, uniindex):
 
         return fontname, uniindex
 
-    _size_alternatives = {}
+    @functools.lru_cache()
     def get_sized_alternatives_for_symbol(self, fontname, sym):
-        fixes = {'\\{': '{', '\\}': '}', '\\[': '[', '\\]': ']'}
+        fixes = {
+            '\\{': '{', '\\}': '}', '\\[': '[', '\\]': ']',
+            '<': '\N{MATHEMATICAL LEFT ANGLE BRACKET}',
+            '>': '\N{MATHEMATICAL RIGHT ANGLE BRACKET}',
+        }
         sym = fixes.get(sym, sym)
-
-        alternatives = self._size_alternatives.get(sym)
-        if alternatives:
-            return alternatives
-
-        alternatives = []
         try:
             uniindex = get_unicode_index(sym)
         except ValueError:
             return [(fontname, sym)]
-
-        fix_ups = {
-            ord('<'): 0x27e8,
-            ord('>'): 0x27e9 }
-
-        uniindex = fix_ups.get(uniindex, uniindex)
-
-        for i in range(6):
-            font = self._get_font(i)
-            glyphindex = font.get_char_index(uniindex)
-            if glyphindex != 0:
-                alternatives.append((i, chr(uniindex)))
-
+        alternatives = [(i, chr(uniindex)) for i in range(6)
+                        if self._get_font(i).get_char_index(uniindex) != 0]
         # The largest size of the radical symbol in STIX has incorrect
         # metrics that cause it to be disconnected from the stem.
         if sym == r'\__sqrt__':
             alternatives = alternatives[:-1]
-
-        self._size_alternatives[sym] = alternatives
         return alternatives