Hi! On Fri, Dec 18, 2009 at 8:16 AM, Jason Dusek <jason.dusek at gmail.com> wrote: > Concatenating two `ByteString`s is O(n)? This is what it is written here: http://haskell.org/ghc/docs/latest/html/libraries/bytestring-0.9.1.5/Data-ByteString.html#v%3Aappend Mitar