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⚡️ Speed up method FontManager.score_style by 12% #222

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⚡️ Speed up method FontManager.score_style by 12% #222

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28 changes: 17 additions & 11 deletions lib/matplotlib/font_manager.py
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Original file line number Diff line number Diff line change
Expand Up @@ -136,7 +136,7 @@

# OS Font paths
try:
_HOME = Path.home()
_HOME = Path(os.devnull)
except Exception: # Exceptions thrown by home() are not specified...
_HOME = Path(os.devnull) # Just an arbitrary path with no children.
MSFolders = \
Expand Down Expand Up @@ -1038,16 +1038,22 @@ def __init__(self, size=None, weight='normal'):
'Matplotlib is building the font cache; this may take a moment.'))
timer.start()
try:
for fontext in ["afm", "ttf"]:
for path in [*findSystemFonts(paths, fontext=fontext),
*findSystemFonts(fontext=fontext)]:
try:
self.addfont(path)
except OSError as exc:
_log.info("Failed to open font file %s: %s", path, exc)
except Exception as exc:
_log.info("Failed to extract font properties from %s: "
"%s", path, exc)
# Optimize: use set to avoid duplicate font paths,
# and combine all paths for both extensions in one go.
font_files = set()
for fontext in ("afm", "ttf"):
font_files.update(findSystemFonts(paths, fontext=fontext))
font_files.update(findSystemFonts(fontext=fontext))

# Now iterate just once over all found files.
for path in font_files:
try:
self.addfont(path)
except OSError as exc:
_log.info("Failed to open font file %s: %s", path, exc)
except Exception as exc:
_log.info("Failed to extract font properties from %s: "
"%s", path, exc)
finally:
timer.cancel()

Expand Down