So what does this thing actually do? I'm hoping someone can cut through the sales hype and give a knowledgable, realistic critique.

www.preact.co.uk/jetnexus.htm

It does seem to work - williamhill.co.uk uses it and it definitely seems quick.

What similar options exist for Apache?

TIA

Jetnexus is an application that integrates into iis masquerading as an isapi application that on the fly compresses htm asp xml etc.

The compression levels are not hype... its a mathematical certainly that htm etc pages will compress to around 1/10 of the original depending on the number of repeating patterns within the text.

The important metric is how fast jetnexus compresses pages that's important... that's where the clever technology and maths comes in... its easy to compress a page, if you want a UNIX alternative look at mod gzip.. but mod gzip’s technology is fine for a small brochure site... but if you tried to roll it out for a large site like will hill it wouldn’t last 5 mins.... mod gzip has browser compatibility problems with some versions of ie/netscape as well...

If you want to learn more read about read about Content-Encoding on the http1.1 rfc or visit
www.contentcompression.com (http://www.contentcompression.com)

Originally posted by bongi

What similar options exist for Apache?

TIA [/B]

mod_gzip is what you'd want for apache. :)