[issue44310] Document that lru_cache uses hard references

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:


New changeset 77eaf14d278882857e658f83681e5b9a52cf14ac by Miss Islington (bot) in branch '3.10':
bpo-44310: Add a FAQ entry for caching method calls (GH-26731) (GH-26777)
https://github.com/python/cpython/commit/77eaf14d278882857e658f83681e5b9a52cf14ac


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