I'm in the process of creating a hosted web application that has the potential for huge amounts of traffic. In the past, I've almost always used Apache as a web server, so I have very little experience with lighttpd.
For those who have experience migrating high-traffic sites from Apache to lighttpd, have you seen significant performance improvements? Did you run into any problems immediately or later down the road?
I'm not looking for opinions on which web server is better.