Hi, I am a happy user of hGetBufNonBlocking, but I have come to realize that mutable arrays are nicer to work with than pointers, so I have considered using hGetArray instead. I do, however, depend on the fact that the function returns as soon as it has read data -- even if less than requested --, like hGetBufNonBlocking does. Is there currently a way to achieve this? Am I right assuming that hGetBuf and hGetArray do not differ much performance-wise? One of the reasons I am curious about using mutable arrays is because of Data.Array.Base.unsafeRead, which seems to be a *lot* faster than accessing the memory through a pointer. Is there anything comparable for pointer access? Peter