Version 0.0 of NHC13, Nearly a Haskell 1.3 Compiler, by Niklas Rojemo, is now available for download from ftp://ftp.cs.chalmers.se/pub/haskell/nhc13 It has the following features - Compiles Haskell 1.3 - Supports Fudgets - Supports several kind of heap profiles: producer constructor retainer life-time biographical combinations of the above Although NHC13 0.0 is probably not yet to be regarded as a mature Haskell 1.3 compiler, it may still be of interest since it provides some new kinds of heap profiles not found in any other Haskell 1.3 compiler. Finding space leaks or other undesired space behaviour using (combinations of) retainer and biographical profiles can be much simpler than with the traditional producer/constructor profiles. Heap profiling also works for Fudgets programs. The commands to use are nhc13 the compiler nhc13make a version of hbcmake for nhc13 nhc13xmake to compile Fudgets programs hp2graph to convert heap profiling output to postscript Manual pages with more details are included in the distributions. Recent papers on heap profiling are Niklas Rojemo and Colin Runciman: "Lag, drag, void and use - heap profiling and space-efficient compilation revisited". In the proceedings of ICFP'96. Colin Runciman and Niklas Rojemo: "Two-pass heap profiling: a matter of life and death". In the proceedings of IFL'96. These are available from ftp://ftp.cs.chalmers.se/pub/users/rojemo/icfp96.ps.gz ftp://ftp.cs.chalmers.se/pub/users/rojemo/ifl96.ps.gz Niklas Rojemo Thomas Hallgren