Hello Chris, Monday, January 23, 2006, 12:27:53 PM, you wrote: CK> The only mutable data structure that come with GHC besides arrays is CK> Data.Hashtable, which is not comptetitive with OCaml Hashtbl or DMD's CK> associative arrays (unless there is something great hidden under CK> Data.Graph). Is there any hope for GHC 6.6? Does anyone have pointers to CK> an existing library at all? Perl and Python and Lua also have excellent CK> built in hashtable capabilities. Where is a good library for Haskell? 1) are you used "+RTS -A10m" / "+RTS -H100m"? 2) Simon Marlow optimized something in the IOArray handling, but i don't understand that is changed. see http://cvs.haskell.org/trac/ghc/ticket/650 -- Best regards, Bulat mailto:bulatz@HotPOP.com