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| -rw-r--r-- | Doc/library/functools.rst | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Doc/library/functools.rst b/Doc/library/functools.rst index 40abdc2..cd59e5b 100644 --- a/Doc/library/functools.rst +++ b/Doc/library/functools.rst @@ -118,6 +118,11 @@ The :mod:`functools` module defines the following functions: The cache's size limit assures that the cache does not grow without bound on long-running processes such as web servers. + In general, the LRU cache should only be used when you want to reuse + previously computed values. Accordingly, it doesn't make sense to cache + functions with side-effects, functions that need to create distinct mutable + objects on each call, or impure functions such as time() or random(). + Example of an LRU cache for static web content:: @lru_cache(maxsize=32) |