I'm using them.  Mind you, the main reason is that I far prefer erlang to javascript :-)
That said, they seem to be a good bit faster (50%?), but I don't really have much else to add...

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On Jan 18, 2011, at 7:20 PM, kowsik wrote:

A couple of questions:

1. Is anyone using erlang views (as opposed to Javascript) in a
production environment?
2. For the map and filter functions, is there any kind of published
performance numbers that show the speed up?

Yes, I'm aware of the built-in reduce functions and I'm using them
extensively. I'm more interested in erlang filters + map functions for
a write-heavy app that I'm working on.