I feel somewhat hypocritical today. Although I've complained about bandwidth consumed by news aggregators polling RSS feeds and have implemented support for both HTTP conditional GET and gzip compression over HTTP to RSS Bandit (along with a number of other aggregators) it turns out that I don't put my money where my mouth is and use blogging software that utilizes either of the aformentioned bandwidth saving techniques.

Ted Leung lists a few feeds from his list of subscriptions that don't use gzip compression and mine is an example of one that doesn't. He also mentiones in a previous post that

As far as gzipped feeds go, about 10% of the feeds in my NNW (about 900) are gzipped. That's a lot worse than I expected. I understand that this can be tough -- the easiest way to implement gzipping is todo what Brent suggested, shove it off to Apache. That means that people who are being hosted somewhere need to know enough Apache config to turn gzip on. Not likely. Or have enlighted hosting admins that automatically turn it on, but that' doesn't appear to be the case. So blogging software vendors could help a lot by turning gzip support on in the software.

What's even more depressing is that for HTTP conditional get, the figure is only about 33% of feeds. And this is something that the blogging software folks should do. We are doing it in pyblosxom.

This is quite unfortunate. Every few months I read some "sky is falling" post about how the bandwidth costs of polling RSS feeds yet many blogging tools don't support existing technologies that could reduce the badnwidth cost of RSS polling by an order of magnitude. I am guilty of this as well.

I'll investigate how difficult it'll be to practice what I preach in the next few weeks. It looks like an upgrade to my version of dasBlog is in the works.


Wednesday, January 7, 2004 6:48:36 AM (GMT Standard Time, UTC+00:00)
Version 1.5 of dasBlog supports both HTTP compression and I added the If-Modified-Since support as well. To enable compression though, you'll want to be sure to copy the relevent parts from web.config.
Friday, January 9, 2004 5:28:23 AM (GMT Standard Time, UTC+00:00)
Thanks for the info. I've upgraded my dasBlog install.
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