Mercurial > public > mercurial-scm > hg
comparison mercurial/revlog.py @ 45779:8719a5b68419
revlog: use LRU for the chain cache
For a large repository, this reduces the number of filelog instances and
associated data a lot. For a 1% speed penalty, it reduces peak RSS by
20% for the full NetBSD test repository.
Differential Revision: https://phab.mercurial-scm.org/D9235
| author | Joerg Sonnenberger <joerg@bec.de> |
|---|---|
| date | Wed, 21 Oct 2020 01:48:09 +0200 |
| parents | edf4fa06df94 |
| children | a5206e71c536 |
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| 45778:6620caf427ec | 45779:8719a5b68419 |
|---|---|
| 666 ) | 666 ) |
| 667 self.index, self._chunkcache = d | 667 self.index, self._chunkcache = d |
| 668 if not self._chunkcache: | 668 if not self._chunkcache: |
| 669 self._chunkclear() | 669 self._chunkclear() |
| 670 # revnum -> (chain-length, sum-delta-length) | 670 # revnum -> (chain-length, sum-delta-length) |
| 671 self._chaininfocache = {} | 671 self._chaininfocache = util.lrucachedict(500) |
| 672 # revlog header -> revlog compressor | 672 # revlog header -> revlog compressor |
| 673 self._decompressors = {} | 673 self._decompressors = {} |
| 674 | 674 |
| 675 @util.propertycache | 675 @util.propertycache |
| 676 def _compressor(self): | 676 def _compressor(self): |
| 2548 | 2548 |
| 2549 transaction.add(self.indexfile, end) | 2549 transaction.add(self.indexfile, end) |
| 2550 | 2550 |
| 2551 # then reset internal state in memory to forget those revisions | 2551 # then reset internal state in memory to forget those revisions |
| 2552 self._revisioncache = None | 2552 self._revisioncache = None |
| 2553 self._chaininfocache = {} | 2553 self._chaininfocache = util.lrucachedict(500) |
| 2554 self._chunkclear() | 2554 self._chunkclear() |
| 2555 | 2555 |
| 2556 del self.index[rev:-1] | 2556 del self.index[rev:-1] |
| 2557 | 2557 |
| 2558 def checksize(self): | 2558 def checksize(self): |