Implement caching of fonts list to improve runtime performance (#3316)

* Implement caching of fonts list to improve runtime performance

* Fix small use_svg_cache kwargs error

* replaced font list with LRU cache

Author: MrDiver

manim/mobject/text/text_mobject.py

@@ -49,6 +49,8 @@ def construct(self):
 
 from __future__ import annotations
 
+import functools
+
 __all__ = ["Text", "Paragraph", "MarkupText", "register_font"]
 
 
@@ -407,6 +409,11 @@ def construct(self):
 
     """
 
+    @staticmethod
+    @functools.lru_cache(maxsize=None)
+    def font_list() -> list[str]:
+        return manimpango.list_fonts()
+
     def __init__(
         self,
         text: str,
@@ -431,13 +438,12 @@ def __init__(
         width: float = None,
         should_center: bool = True,
         disable_ligatures: bool = False,
+        use_svg_cache: bool = False,
         **kwargs,
     ) -> None:
         self.line_spacing = line_spacing
-        if font and warn_missing_font:
-            fonts_list = manimpango.list_fonts()
-            if font not in fonts_list:
-                logger.warning(f"Font {font} not in {fonts_list}.")
+        if font and warn_missing_font and font not in Text.font_list():
+            logger.warning(f"Font {font} not in {Text.font_list()}.")
         self.font = font
         self._font_size = float(font_size)
         # needs to be a float or else size is inflated when font_size = 24
@@ -491,7 +497,7 @@ def __init__(
             height=height,
             width=width,
             should_center=should_center,
-            use_svg_cache=False,
+            use_svg_cache=use_svg_cache,
             **kwargs,
         )
         self.text = text
@@ -1133,6 +1139,11 @@ def construct(self):
 
     """
 
+    @staticmethod
+    @functools.lru_cache(maxsize=None)
+    def font_list() -> list[str]:
+        return manimpango.list_fonts()
+
     def __init__(
         self,
         text: str,
@@ -1156,10 +1167,8 @@ def __init__(
     ) -> None:
         self.text = text
         self.line_spacing = line_spacing
-        if font and warn_missing_font:
-            fonts_list = manimpango.list_fonts()
-            if font not in fonts_list:
-                logger.warning(f"Font {font} not in {fonts_list}.")
+        if font and warn_missing_font and font not in Text.font_list():
+            logger.warning(f"Font {font} not in {Text.font_list()}.")
         self.font = font
         self._font_size = float(font_size)
         self.slant = slant