--- a/mercurial/revlog.py Thu Nov 06 14:08:25 2014 -0800
+++ b/mercurial/revlog.py Thu Nov 06 14:20:05 2014 -0800
@@ -204,6 +204,7 @@
self._basecache = None
self._chunkcache = (0, '')
self._chunkcachesize = 65536
+ self._maxchainlen = None
self.index = []
self._pcache = {}
self._nodecache = {nullid: nullrev}
@@ -219,6 +220,8 @@
v = 0
if 'chunkcachesize' in opts:
self._chunkcachesize = opts['chunkcachesize']
+ if 'maxchainlen' in opts:
+ self._maxchainlen = opts['maxchainlen']
if self._chunkcachesize <= 0:
raise RevlogError(_('revlog chunk cache size %r is not greater '
@@ -1216,11 +1219,13 @@
base = rev
else:
base = chainbase
- return dist, l, data, base, chainbase
+ chainlen = self.chainlen(rev) + 1
+ return dist, l, data, base, chainbase, chainlen
curr = len(self)
prev = curr - 1
base = chainbase = curr
+ chainlen = None
offset = self.end(prev)
flags = 0
d = None
@@ -1240,7 +1245,7 @@
d = builddelta(prev)
else:
d = builddelta(prev)
- dist, l, data, base, chainbase = d
+ dist, l, data, base, chainbase, chainlen = d
# full versions are inserted when the needed deltas
# become comparable to the uncompressed text
@@ -1249,7 +1254,8 @@
cachedelta[1])
else:
textlen = len(text)
- if d is None or dist > textlen * 2:
+ if (d is None or dist > textlen * 2 or
+ self._maxchainlen and chainlen > self._maxchainlen):
text = buildtext()
data = self.compress(text)
l = len(data[1]) + len(data[0])