RSS/Atom feed parsing in Haskell

What is the best library to parse a feeds (RSS,Atom...) in Haskell?

I'm especially interested in the points:

• Performance/memory
• Encoding issues for non-English characters?
• Correctness, detection of feed-type (RSS 1, RSS 2, Atom...), handling of non-valid feeds, etc.

I already stumbled upon feed, however it uses Strings. How can this affect performance/memory, especially if ByteString.Lazy or Text are used elsewhere throughout the app.