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Re: svn commit: r19456 - trunk/subversion/libsvn_fs_fs

From: Peter N. Lundblad <peter_at_famlundblad.se>
Date: 2006-04-26 21:45:51 CEST

Garrett Rooney writes:
> On 4/26/06, lundblad@tigris.org <lundblad@tigris.org> wrote:
> > Author: lundblad
> > Date: Wed Apr 26 12:30:40 2006
> > New Revision: 19456
> >
> > Modified:
> > trunk/subversion/libsvn_fs_fs/dag.c
> > trunk/subversion/libsvn_fs_fs/dag.h
> > trunk/subversion/libsvn_fs_fs/fs_fs.c
> > trunk/subversion/libsvn_fs_fs/fs_fs.h
> > trunk/subversion/libsvn_fs_fs/tree.c
> >
> > Log:
> > In FSFS, decrease the server load somewhat in a common case where
> > the filesystem has actually stored the delta the client is asking for.
>
> Nice! Does this give us a noticable speedup in any benchmarks?
>
I tried blame locally and it gave maybe 30% on that particular test. Replay
seemed *somewhat* faster, but it didn't save the world or
something.. Take these numbers with a truck full of salt, but still,
just tossing out a delta for every other file against its immediate
predecessor justified this change. There are more opportunities: just
combining deltas when the source is a predecessor to some previous
version of the target and avoiding one of the delta applications when
the two file have a common ancestor. That can be done later.

Regards,
//Peter

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Received on Wed Apr 26 21:46:12 2006

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