Dear all: I am pleased to announce the initial release of "mutable-iter"[1], an extension to the iteratee package which uses mutable buffers. This allows for iteratees to act upon a mutable buffer, which means that processing can occur without performing any extra allocations. This may be useful for applications in which garbage collections interfere with processing (e.g. real-time applications), or under severe memory pressure. This package is highly experimental and somewhat low-level; bug reports and suggestions are welcome! Thanks, John [1] http://hackage.haskell.org/package/mutable-iter