On Mon, Jul 26, 2010 at 10:29:04AM +0300, Török Edwin wrote: > Lwt's Lwt_preemptive seems to allow one to use 'preemptive > threads' (which I assume are just usual OCaml threads). > So would it be possible to put the file I/O on Lwt_preemptive.detach > threads?
Yes. > Has anyone tried to measure the performance of doing that? Yes, i tried it some time ago with two small C programs which were just reading a file on the disk. One doing read operations in a simple loop, and one launching a thread for each read operation (or reusing the same thread). The threaded version was about 100 times slower than the non-threaded one. BTW it is planed to add some kind of asynchronous file I/O support in Lwt by using mmap and mincore. Best, -- Jérémie _______________________________________________ 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
