Yesod is actually backed by Warp, a webserver that is significantly faster than snap:<p><a href="http://www.yesodweb.com/blog/2011/2/warp-speed-ahead" rel="nofollow">http://www.yesodweb.com/blog/2011/2/warp-speed-ahead</a><p>The code for the benchmarks can be found here:<p><a href="https://github.com/snoyberg/benchmarks" rel="nofollow">https://github.com/snoyberg/benchmarks</a>
Discussion about this overview at the Haskell Reddit: <a href="http://www.reddit.com/r/haskell/comments/hs0e9/three_haskell_web_frameworks/" rel="nofollow">http://www.reddit.com/r/haskell/comments/hs0e9/three_haskell...</a>
For those interested in something lighter weight, there's also Hakyll, which I use and love: <a href="http://jaspervdj.be/hakyll/" rel="nofollow">http://jaspervdj.be/hakyll/</a>