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bdiff: gradually enable the popularity hack...
bdiff: gradually enable the popularity hack Patch from Jason Orendorff The lower the threshold, the stronger the popularity hack's influence. So at 3999 lines, the hack is disabled; and at 4000 lines, the hack is enabled at maximum strength (t=4). No source file in mercurial/crew is over 4000 lines. But there are, oh, a few such files in Mozilla. I can testify that this hack causes hg to generate some correct but eyebrow-raising patches. I think the hack should phase in gradually. The threshold should be high for small files where we don't need it so much. Like this: t = (bn < 31000) ? 1000000 / bn : bn / 1000; That would leave the popularity hack disabled for small files, then gradually phase it in: bn < 1000 -- t > bn (popularity hack is completely disabled) bn == 1000 -- t = 1000 (still effectively disabled) bn == 2000 -- t = 500 (only hits unusual files) bn == 10000 -- t = 100 (only hits especially common lines) bn == 31000 -- t = 31 (hack is at maximum power) bn == 32000 -- t = 32 (hack could backfire, ease off)
Adrian Buehlmann - - Load All Authors

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undumprevlog
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#!/usr/bin/env python
# Undump a dump from dumprevlog
# $ hg init
# $ undumprevlog < repo.dump
import sys
from mercurial import revlog, node, util, transaction
for fp in (sys.stdin, sys.stdout, sys.stderr):
util.set_binary(fp)
opener = util.opener('.', False)
tr = transaction.transaction(sys.stderr.write, opener, "undump.journal")
while 1:
l = sys.stdin.readline()
if not l:
break
if l.startswith("file:"):
f = l[6:-1]
r = revlog.revlog(opener, f)
print f
elif l.startswith("node:"):
n = node.bin(l[6:-1])
elif l.startswith("linkrev:"):
lr = int(l[9:-1])
elif l.startswith("parents:"):
p = l[9:-1].split()
p1 = node.bin(p[0])
p2 = node.bin(p[1])
elif l.startswith("length:"):
length = int(l[8:-1])
sys.stdin.readline() # start marker
d = sys.stdin.read(length)
sys.stdin.readline() # end marker
r.addrevision(d, tr, lr, p1, p2)
tr.close()