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Implement caching of fonts list to improve runtime performance #3316

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merged 5 commits into from
Dec 10, 2023
Merged

Implement caching of fonts list to improve runtime performance #3316

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6cc6182
Implement caching of fonts list to improve runtime performance
MrDiver Aug 6, 2023
32e99e0
Fix small use_svg_cache kwargs error
MrDiver Aug 6, 2023
9dd9442
Merge branch 'main' of github.com:ManimCommunity/manim into 3221-slow…
MrDiver Aug 6, 2023
7925ba8
Merge branch 'main' of github.com:ManimCommunity/manim into 3221-slow…
MrDiver Dec 10, 2023
2457248
replaced font list with LRU cache
MrDiver Dec 10, 2023
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20 changes: 13 additions & 7 deletions manim/mobject/text/text_mobject.py
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Original file line number Diff line number Diff line change
Expand Up @@ -406,6 +406,7 @@ def construct(self):
Text('The horse does not eat cucumber salad.')

"""
font_list = []

def __init__(
self,
Expand All @@ -431,13 +432,16 @@ 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}.")
Text.font_list = (
Text.font_list if len(Text.font_list) > 0 else manimpango.list_fonts()
)
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More of a semantical question: is there any particular argument against implementing this as a cached method of Text? Like

class Text(...):
    ...
    
    @staticmethod
    @functools.lru_cache(maxsize=None)
    def font_list() -> list[str]:
        return manimpango.list_fonts()

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I can bench it later on, good point but might make it still more inefficient because it checks the cache but it is also in c, so who knows what will happen.

I give report as soon as i benched it

if 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
Expand Down Expand Up @@ -491,7 +495,7 @@ def __init__(
height=height,
width=width,
should_center=should_center,
use_svg_cache=False,
use_svg_cache=use_svg_cache,
**kwargs,
)
self.text = text
Expand Down Expand Up @@ -1157,9 +1161,11 @@ def __init__(
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}.")
Text.font_list = (
Text.font_list if len(Text.font_list) > 0 else manimpango.list_fonts()
)
if 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
Expand Down
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