Thomas wrote:
"Regarding FreeBSD: How big are changelog and manifest compared to the
other data in .hg?"

I don't have a full history conversion locally anymore, but I can clone one
of the converted branches of Ollivier Robert.  A partial history, starting from
an import of a src-tree snapshot on Thu Feb 21 23:29:26 2008 +0000 now
has a little over 400 changesets, and .hg/store/ includes:

keramida@kobe:/home/keramida/hg/freebsd/head/.hg/store$ ls -l
total 1556
-rw-rw-r--   1 keramida  users  -  274900 Mar  8 21:23 00changelog.d
-rw-rw-r--   1 keramida  users  -   23360 Mar  8 21:23 00changelog.i
-rw-rw-r--   1 keramida  users  - 1218894 Mar  8 21:23 00manifest.d
-rw-rw-r--   1 keramida  users  -   23360 Mar  8 21:23 00manifest.i
drwxrwxr-x  23 keramida  users  -    1024 Feb 22 20:07 data
-rw-rw-r--   1 keramida  users  -     229 Mar  8 21:23 undo
keramida@kobe:/home/keramida/hg/freebsd/head/.hg/store$