It looks, there remains a questions on memory distribution in ghc-5.00 -interpreted : can ghci provide a command measuring the part of heap taken by interpreted programs, by interfaces? (or, at least, their sum) For, with -O and much in-lining, the interfaces may be very large. Also compare it to the _batch_ mode: commanding ghc -o run Foo.o ./run +RTS -MXXm -RTS the user is sure that XX Mb is only for the `real' computation data. ----------------- Serge Mechveliani mechvel@botik.ru