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Re: Does Subversion enable compression automatically under Apache

From: Ben Collins-Sussman <sussman_at_collab.net>
Date: 2005-03-08 22:55:59 CET

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.

If anything, might *increase* the total time, because now there's
double (redundant) compression going on, which takes both client and
server CPU even more.

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Received on Tue Mar 8 23:06:06 2005

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