Am Dienstag, den 23.11.2010, 17:53 +0000 schrieb Isaac Gouy: > Christophe TROESTLER <Christophe.Troestler+ocaml <at> umh.ac.be> writes: > > > > > On Tue, 23 Nov 2010 02:03:48 +0000, Isaac Gouy wrote: > > > > > > > C version : 12.11 secs > > > > OCaml version : 47.22 secs > > > > OCaml version with GC parameters tuned ("interesting alternative" > > > section) : 12.67 secs > > > > > > And of course you know because that GC tuned OCaml program is shown > > > on the > > > benchmarks game website > > > http://shootout.alioth.debian.org/u32/program.php?test=binarytrees& > > > lang=ocaml&id=1 > > > > Since you are here, please explain why C can use memory pools and vec > > tor instructions but tuning the GC of OCaml ― although it is part of > > the standard library ― is considered an “alternative”. > > > You seem to be suggesting that "tuning the GC" is considered "alternative" > only > for OCaml programs. > > You seem to be suggesting that "tuning the GC" is considered "alternative" for > every task. > > Neither is true. > > You seem to be suggesting some kind of equivalence between vector instructions > and "tuning the GC". > You haven't said why they should be considered equivalent. > > Nor have you said why you think C should not be allowed to use memory pools.
Quite easy: because you are comparing results that cannot be compared. The reader of this benchmark (binary trees) might have the impression that C is generally that fast - however, this would be no longer true if these binary trees were used as library in a bigger program where using memory pools is inappropriate, e.g. because the data managed by the binary trees has an unpredictable lifetime. I do not say that it is complete nonsense to do this comparison, but only that it is more specific than a reader would assume. The innocent reader expects a comparison of binary tree performance, not of methods of managing memory (and this is it finally). The true name of this test should be "manage_many_small_memory_cells_where_pools_are_allowed". (It would be actually interesting to compare various versions of this test with different memory management methods.) Gerd > > > > > > _______________________________________________ > Caml-list mailing list. Subscription management: > http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list > Archives: http://caml.inria.fr > Beginner's list: http://groups.yahoo.com/group/ocaml_beginners > Bug reports: http://caml.inria.fr/bin/caml-bugs > -- ------------------------------------------------------------ Gerd Stolpmann, Bad Nauheimer Str.3, 64289 Darmstadt,Germany g...@gerd-stolpmann.de http://www.gerd-stolpmann.de Phone: +49-6151-153855 Fax: +49-6151-997714 ------------------------------------------------------------ _______________________________________________ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs