Mercurial > public > mercurial-scm > hg

comparison mercurial/revlog.py @ 19713:c2e27e57d250

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
revlog: add a fast method for getting a list of chunks This moves _chunkraw into the loop. Doing that improves revlog decompression -- in particular, manifest decompression -- significantly. For a 20 MB manifest which is the result of a > 40k delta chain, hg perfmanifest improves from 0.55 seconds to 0.49 seconds.
author Siddharth Agarwal <sid0@fb.com>
date Fri, 06 Sep 2013 16:31:35 -0700
parents 6a411a06cb1f
children 0e07c0b5fb1c
comparison
equal deleted inserted replaced
19712:79e5de2bfa8c 19713:c2e27e57d250
851 return self._getchunk(start, length) 851 return self._getchunk(start, length)
852 852
853 def _chunk(self, rev): 853 def _chunk(self, rev):
854 return decompress(self._chunkraw(rev, rev)) 854 return decompress(self._chunkraw(rev, rev))
855 855
856 def _chunks(self, revs):
857 '''faster version of [self._chunk(rev) for rev in revs]
858
859 Assumes that revs is in ascending order.'''
860 start = self.start
861 length = self.length
862 inline = self._inline
863 iosize = self._io.size
864 getchunk = self._getchunk
865
866 l = []
867 ladd = l.append
868
869 for rev in revs:
870 chunkstart = start(rev)
871 if inline:
872 chunkstart += (rev + 1) * iosize
873 chunklength = length(rev)
874 ladd(decompress(getchunk(chunkstart, chunklength)))
875
876 return l
877
856 def _chunkbase(self, rev): 878 def _chunkbase(self, rev):
857 return self._chunk(rev) 879 return self._chunk(rev)
858 880
859 def _chunkclear(self): 881 def _chunkclear(self):
860 self._chunkcache = (0, '') 882 self._chunkcache = (0, '')
931 953
932 self._chunkraw(base, rev) 954 self._chunkraw(base, rev)
933 if text is None: 955 if text is None:
934 text = str(self._chunkbase(base)) 956 text = str(self._chunkbase(base))
935 957
936 bins = [self._chunk(r) for r in chain] 958 bins = self._chunks(chain)
937 text = mdiff.patches(text, bins) 959 text = mdiff.patches(text, bins)
938 960
939 text = self._checkhash(text, node, rev) 961 text = self._checkhash(text, node, rev)
940 962
941 self._cache = (node, rev, text) 963 self._cache = (node, rev, text)