[merge] bzr uses permissions of containing directory

[Michael Ellerman]

On Thu, 15 Dec 2005 16:05, John Arbash Meinel wrote:
> After much gnashing of teeth, I have updated the Transport interface,
> Branch itself, such that it know checks to see what the mode of '.bzr'
> is, and then uses that to determine the permissions for all files
> underneath.
> You can see my changes here:
> http://bzr.arbash-meinel.com/branches/bzr/permissions/

A few timings:

My branch only has 87 revisions, but lots of files. 20,848 weaves, 21,280 
files under .bzr in total. It's currently not clean if that matters, 113 
modified & 12 unknown.

concordia ~/src/work$ time bzr branch kexec/ kexec-branch
208.64user 28.50system 14:36.12elapsed 27%CPU (876 seconds)

concordia ~/src/work$ time bzr branch kexec/ kexec-branch
235.37user 30.72system 14:28.08elapsed 30%CPU (868 seconds)

concordia ~/src/work$ time ../bzr/permissions/bzr branch kexec/ kexec-branch
236.24user 32.79system 18:34.04elapsed 24%CPU (1114 seconds)
                       ^^^^^^^^

concordia ~/src/work$ time ../bzr/permissions/bzr branch kexec/ kexec-branch
227.13user 30.86system 15:30.18elapsed 27%CPU (930 seconds)

concordia ~/src/work$ time ../bzr/permissions/bzr branch kexec/ kexec-branch
170.39user 24.43system 15:26.65elapsed 21%CPU (926 seconds)

Worst case it's 27% slower, best case it's only 5%. Not sure what accounts for 
the 18:00 time?

As a comparison, cloning the same tree with git (it's versioned by both):

concordia ~/src/work$ /usr/bin/time git clone kexec/ kexec-branch
defaulting to local storage area
Packing 146363 objects
265.86user 15.55system 7:13.05elapsed 64%CPU (433 seconds)

cheers

-- 
Michael Ellerman
IBM OzLabs

email: michael:ellerman.id.au
inmsg: mpe:jabber.org
wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person
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