revlog: don't cache parsed tuples in the C module
A cached entry creates ~8 Python objects per cached changeset, which
comes to around 200 Bytes per cached changeset on AMD64. Especially for
operations that touch a lot of changesets, that can easily sum up to
more than a 100MB of memory. Simple tests on large repositories show
<2% runtime penalty for ripping out the cache, even for cache heavy
operations like "hg log" for all revisions.
Differential Revision: https://phab.mercurial-scm.org/D9155
[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
'''
skip-string-normalization = true
quiet = true