What is the best common-lisp web framework available?
I'm looking for something that's suitable for developing commercial web applications and capable of handling high traffic sites similar to Stack Overflow. It should also have built-in session handling and other similar features.
My experience:
There's also BKNR.
You could try using Caveman http://clacklisp.org/caveman/
It's based on Clack and is simple to start with
With most success I've used webactions
from Franz. I have had a terrible hard time with UCW, but tried to write some "tutorial" for how to use it. I can not tell if anything has improved with UCW since I wrote that tutorial
As you see they say it's outdated and that's true. Why is it outdated? Because nobody has cared to improve it or actualize it, and so my conclusion is, no-one seems to like it very mucch. But YMMV of course...
It's been a while since I tried to get into CL web programming, but at the time a lot of people were very happy using KPAX.
There's also Weblocks, which builds on hunchentoot.
Another similar SO-thread can be found here.
AllegroServe and Hunchentoot seems to be the most used webservers. Not really frameworks, though. I've got some experience using Hunchentoot w/sbcl and my tests have "proved" it to be both fast and reliable. They've both got session handling.
The author of Hunchentoot has some views on performance as well. Most likely the webserver will not be your bottleneck. If it turns out to be then remember that Hunchentoot is open source :-)
You could also take a look at SymbolicWeb which is more of a framework, but still in its early stages. Other suggestions in the other thread.