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build perf: avoid thousands of needless file opens and yaml parses #11190

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build perf: avoid thousands of needless file opens and yaml parses #11190

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perf: avoid thousands of needless file opens and yaml parses
isimluk Oct 10, 2023
ecdd234
use lru_cache instead of cache to support antiquated systems
isimluk Oct 10, 2023
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20 changes: 20 additions & 0 deletions ssg/components.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,27 @@

import ssg.yaml

try:
from functools import lru_cache
except ImportError: # Viva la python 2.7
from functools import wraps

def lru_cache(maxsize):

def support_maxsize_on_suse15_wrapper(user_function):
cache = {}

@wraps(user_function)
def wrapper(*args):
key = tuple(args)
if key not in cache:
cache[key] = user_function(*args)
return cache[key]
return wrapper
return support_maxsize_on_suse15_wrapper


@lru_cache(maxsize=16)
def load(components_dir):
components = {}
for component_filename in os.listdir(components_dir):
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