Re: Does Subversion enable compression automatically under Apache

On Tue, 2005-03-08 at 15:55 -0600, Ben Collins-Sussman wrote:
> On Mar 8, 2005, at 3:40 PM, Moisei wrote:
>
> > Thank you, Mark.
> > I do my homework before I post to the list, so indeed I enabled and
> > configured
> > the mod_deflate with large memory buffer size and high compression
> > level.
> > Surprisingly, it takes the exactly same time to checkout quite large
> > code-base.
> > This is why I've asked whether it is already compressed, I just cannot
> > find any
> > another explanation.
> >
>
> 90% of of the data travelling over the network is file data. For
> checkouts and commits, Subversion sends all file data as binary diffs,
> which are essentially already compressed. So turning on mod_deflate
> isn't likely to decrease the amount of network traffic at all.

This actually isn't true.

New file data, and the instructions are suspectible to compression.

zlib compression on them will probably buy you 10%, maybe more.

In any case, it's *not* likely to increase the space taken :)

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Received on Wed Mar 9 03:04:32 2005