This is on Simon Marlow's recent requests for the ghc-6.4.1-pre testing and benchmarking. I have installed ghc-6.4.1-July-12-2005 on Linux Debian by making it with ghc-6.4.1-June-14. 1. A simple test with list sorting and such, shows almost the same result as in ghc-6.4 and as in 5.02, for the performance, and minimal needed memory too. 2. The tests of ghc-6.4.1-July-12 on dumatel-1.03-pre (compex symbolic computations in prover) and docon-2.09-pre (complex computer algebra) look all right. I tested separately the performance, and minimal needed memory, for the tasks of 3-variable polynomial GCD and bi-variable factoring. It shows almost the same as in 6.4 and 5.02. 3. Memory test with loading to ghci the whole DoCon test (DoCon compiled with -O, tests compiled with -Onot) and performing it: 6.4.1-July-12 needs the minimum of 18 Mb, 6.4, 6.4.1-June-14 need 10 Mb. -- ? I am not very sure about 6.4 and 6.4.1-June-14, this may be a bug in old DoCon documenation. If the GHC developers need to repeat and make sure about this, let them ask me, and I would send them docon-2.09-pre, with description of what precisely to apply. Personally, I would not like now to re-install 6.4. On the other hand, this 1.8 factor difference looks suspicious, it worths to make sure. 4. A problem with the package clash in self-make. Now, Simon says, it will be fixed. Regards, ----------------- Serge Mechveliani mechvel@botik.ru