view contrib/dumprevlog @ 28491:f57f7500a095

changelog: lazily parse user

Same strategy as before.

Revsets not accessing the user demonstrate a slight performance win:

desc(bug)
0.887169
0.910400
0.895514

date(2015)
0.878797
0.870697
0.820987

extra(rebase_source)
0.865446
0.841644
0.823811

date(2015) or branch(default)
0.968276
0.945792
0.910981

#!/usr/bin/env python
# Dump revlogs as raw data stream
# $ find .hg/store/ -name "*.i" | xargs dumprevlog > repo.dump

import sys
from mercurial import revlog, node, util

for fp in (sys.stdin, sys.stdout, sys.stderr):
    util.setbinary(fp)

for f in sys.argv[1:]:
    binopen = lambda fn: open(fn, 'rb')
    r = revlog.revlog(binopen, f)
    print "file:", f
    for i in r:
        n = r.node(i)
        p = r.parents(n)
        d = r.revision(n)
        print "node:", node.hex(n)
        print "linkrev:", r.linkrev(i)
        print "parents:", node.hex(p[0]), node.hex(p[1])
        print "length:", len(d)
        print "-start-"
        print d
        print "-end-"