[runevault]

That's really going to depend on what your web app does. Simple CRUD work? Clojure may not give you much benefit over RoR (at least not until compojure or one of the other frameworks gets a lot more time put into it).

If part of what your web app does involves heavy duty data processing then it could be much more interesting. Flightcaster (Ruby or JRuby, I forget which) on Rails front end, Clojure doing all the hardcore machine learning data crunching on the back end.

Of course being a compiled language, odds are you can write faster code in clojure in at least comparable number of lines of code to ruby, with the speed of the jvm. So if you think your site will see much traffic that might be valuable to you as well.

[nearestneighbor]

    JRuby
    
    faster code in clojure ... with the speed of the jvm.

Something irks me about this argument :-)

[ramchip]

JRuby seems quite slow though. Definitely not 'close to the JVM' like Clojure. Perhaps we could say it's the speed of the JVM versus the speed of the JVM with an elephant sitting on it ;)

[runevault]

Touche, though way more people use things other then the JVM for ruby from the sounds of what I see standing on the outside looking in.