Hello Haskell-Cafe, i've added a lot of low-level information to the Arrays wiki page. new material starts from note about GHC 6.6 in http://haskell.org/haskellwiki/Modern_array_libraries#StorableArray_.28modul... there are several details, however, which makes it imperfect. first, as usual, is my awkward English. please correct my language misuse. in particular, i don't know how to better name the page itself, meaning "modern library which implements many array types" second is that it will be great to add examples demonstrating each discussed concept: casting, freezing, unsafe indexing, [::]. we also still don't have examples for unboxed and diff arrays third is that i'm not 100% sure that information about GHC internals i provided is correct. can someone with a good knowledge of RTS internals check it, including http://haskell.org/haskellwiki/Modern_array_libraries#Welcome_to_machine:_Ar... and next section plus abovementioned link with information about StorableArray in GHC 6.6? -- Best regards, Bulat mailto:Bulat.Ziganshin@gmail.com