Re: [syndication] feed compression

[elijah wright <elw@stderr.org>]

> It seems something worth promoting. Sorry for not doing this before, but
> I have been away (with the mind as well) Please someone answeres the
> following , off list if you wish, and I shall put it out. If I get more
> than one reply, I can merge the answers
>
> What is rss feed compression

quite simply, you gzip your feed.

> What advantages does it deliver

less overall data transfer, transparent to most userspace HTTP tools.
less data to transfer = faster transfers.  compression is a one-time task
at the server end, decompression is pushed off onto the clients as they
pull the feed.

> How is it best implemented?

apache mod_gzip

> Can compression be external to the site (ie the feed links to another
> website that compresses the feed and produces another compressed feed as
> output)

probably, but i don't know why you'd bother.

> Who has done it already

use mod_gzip

> Where can people get their feeds compressed

use mod_gzip:

http://sourceforge.net/projects/mod-gzip/

--elijah



> ----- Original Message -----
> From: "Brendan Quinn" <Brendan.Quinn@bbc.co.uk>
> To: <syndication@yahoogroups.com>
> Sent: Monday, June 14, 2004 1:10 PM
> Subject: RE: [syndication] Ok folks, let's support feed compression
>
>
> If you want to support gzip without much work, take a look at this Apache
> module...
>
> http://sourceforge.net/projects/mod-gzip/
>
> I also wrote an Apache module years ago that checks for a .gz version of
> every static file on the web server, and if the browser accept-encoding:
> handles GZ, sends that version. This way the actual compression can be done
> by a spider running asynchronously to the web server process (maybe on a
> separate machine), and very little extra  extra load is placed on the server
> itself (really just the cost of one or two stat() calls for each request). I
> haven't released the code but if anyone's interested let me know and I can
> put it up somewhere. The new mod_gzip might support that kind of thing
> anyway.
>
> Brendan.
>
> -----Original Message-----
> From: Jeff Barr [mailto:jeff@vertexdev.com]
> Sent: 01 June 2004 15:55
> To: syndication@yahoogroups.com; syndication@yahoogroups.com
> Subject: Re: [syndication] Ok folks, let's support feed compression
>
> I have added a histogram of the compression ratios, expressed
> as a percent of the original size:
>
> http://www.syndic8.com/stats.php?Sectionþeds#FeedCompression
>
> I am surprised that no one seems to care about this.
> Wouldn't it be great to reduce feed traffic to 1/3 of its
> old level? We can help to make that happen.
>
> Jeff;
>
> On Fri, 28 May 2004 21:48:41 -0700, "Jeff Barr" <jeff@vertexdev.com>
> said:
> > Hello World,
> >
> > Syndic8 now collects and reports on the use of gzip compression
> > by feed suppliers. I have posted lots of info here:
> >
> > http://www.syndic8.com/weblog/archive/000333.html
> >
> > The executive summary is that the potential savings from
> > compression are very high, and that very few feeds
> > support it right now.
> >
> > We need to get suppliers and consumers to do more in
> > this area!
> >
> > Jeff;
> > ----
> > Syndic8:
> > * Blog: http://www.syndic8.com/weblog/
> > * Featured Feeds: http://www.syndic8.com/box/featured_feeds/
> > * Orkut: http://www.orkut.com/Community.aspx?cmm43
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
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