Configuring Varnish to cache per user agent in Pressflow | Bridgecity Studio

If you're familiar with Varnish, you're well aware of its awesomeness. It can turn your site from a slowpoke into a speed demon. We recently observed a site (which we didn't build) that was, under load, taking about 800ms to respond per request. In went Varnish, and the response time for 99% of the requests dropped to just over 2ms. Kind of a "Holy crap!" moment. Sometimes though, you might run in

[razokulover]

“call detect_device;”