Re: [Haskell-cafe] Known Unknowns
Donald Bruce Stewart wrote: haskell: There is a new combined benchmark, partial sums that subsumes several earlier benchmarks and runs 9 different numerical calculations: http://haskell.org/hawiki/PartialSumsEntry Ah! I had an entry too. I've posted it on the wiki. I was careful to watch that all loops are compiled into nice unboxed ones in the Core. It seems to run a little bit faster than your more abstracted code. Timings on the page. Also, -fasm seems to only be a benefit on the Mac, as you've pointed out previously. Maybe you could check the times on the Mac too? -- Don Yeah. I had not tried all the compiler options. Using -fasm is slower on this for me as well. I suspect that since your code will beat the entries that have been posted so far, so I thin you should submit it. Also, could you explain how to check the Core (un)boxing in a note on the (new?) wiki? I would be interested in learning that trick. -- Chris ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Known Unknowns
haskell: Donald Bruce Stewart wrote: haskell: There is a new combined benchmark, partial sums that subsumes several earlier benchmarks and runs 9 different numerical calculations: http://haskell.org/hawiki/PartialSumsEntry Ah! I had an entry too. I've posted it on the wiki. I was careful to watch that all loops are compiled into nice unboxed ones in the Core. It seems to run a little bit faster than your more abstracted code. Timings on the page. Also, -fasm seems to only be a benefit on the Mac, as you've pointed out previously. Maybe you could check the times on the Mac too? -- Don Yeah. I had not tried all the compiler options. Using -fasm is slower on this for me as well. I suspect that since your code will beat the entries that have been posted so far, so I thin you should submit it. ok, I'll submit it. Also, could you explain how to check the Core (un)boxing in a note on the (new?) wiki? I would be interested in learning that trick. Ah, i just do: ghc A.hs -O2 -ddump-simpl | less and then read the Core, keeping an eye on the functions I'm interested in, and checking they're compiling to the kind of loops I'd write by hand. This is particularly useful for the kinds of tight numeric loops used in some of the shootout entries. Cheers, Don ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] graphics Windows Programming
There are several graphics packages to select from... But which one is the easiest to work with for students for a ghci - windows environment. I sense that cairo / gtk2hs does not support ghci. From the HOpenGL home page I cannot find out what I would need to download for a windows environment (can somebody point me to the right direction?). We have used SOE under hugs but I sense it is not working with ghci? We found it also somewhat deficient for graphics beyond the content of the book - has it been extended and improved? Any advice greatly appreciated! Andrew Frank ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] graphics Windows Programming
On Thu, 2006-01-26 at 14:25 +0100, Andrew U. Frank wrote: There are several graphics packages to select from... But which one is the easiest to work with for students for a ghci - windows environment. I sense that cairo / gtk2hs does not support ghci. At the moment we can make it work with GHC or with GHCi but not both at the same time. The details of the exact problem were described here: http://sourceforge.net/mailarchive/message.php?msg_id=11297970 If you only want to use it in GHCi and not GHC then you'd be ok. I can show you what to do. If it helps, we hope to have this problem solved in GHC 6.4.2 by allowing Gtk2Hs to use a slightly different list of DLLs with GHCi than with GHC. From the HOpenGL home page I cannot find out what I would need to download for a windows environment (can somebody point me to the right direction?). HOpenGL comes with GHC. I've had programs that use Gtk2Hs with HOpenGL working on windows. We have used SOE under hugs but I sense it is not working with ghci? We found it also somewhat deficient for graphics beyond the content of the book - has it been extended and improved? The current development version of Gtk2Hs comes with an implementation of SOE. This has already been used for teaching a university course. For a more sophisticated graphics API you can use the cairo library that comes with Gtk2Hs. This provides a monadic API rather than SOE's expression style API. On the other hand it is far more powerful and can produce stunning results. Do get back to me if any of this is of interest to you. Duncan ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] unary pattern matching
I have often wanted a shorthand syntax for testing if a value matches a given pattern. I want to implement such an extension for jhc but can't decide an appropriate syntax so I thought I'd ask the group. basically I want something like /Left (Just _)/ expands to \x - case x of Left (Just _) - True _ - False so you can do things like when (/Just _/ x) $ putStrLn x is something or map /Left (Foo _ 'x')/ xs to get a list of booleans saying whether the xs match or not. however, the '/' syntax clearly doesn't work, nor would anything that conflicts with normal haskell syntax. does anyone have any better ideas? John -- John Meacham - ⑆repetae.net⑆john⑈ ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] unary pattern matching
On 1/26/06, Donald Bruce Stewart [EMAIL PROTECTED] wrote: Something like pattern guards? f x | Just _ - x = putStrLn something These subsume pattern guards... -- Taral [EMAIL PROTECTED] Computer science is no more about computers than astronomy is about telescopes. -- Edsger Dijkstra ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
