Hi Kostirya,
I'm putting the parallel-haskell and ghc-users lists on cc, just in case other
(better informed) folks want to chip in here.
First of all, I'm assuming you're talking about network latency when compiling
with -threaded - if not I apologise for misunderstanding!
There is
Hi Edsko,
Can you explain the figure linked to on that page a bit? E.g. how should
the axes be labelled?
On Wed, Feb 6, 2013 at 9:33 AM, Edsko de Vries ed...@well-typed.com wrote:
Hi,
Just for clarity's sake (as the author of that Latency section that Tim
referred to): I have addressed all
I (with help from Kazu and helpful comments from Bryan and Johan) have nearly
completed an overhaul to the IO manager based on my observations and we are in
the final stages of getting it into GHC
This is really helpful. Thank you very much Andreas, Kazu, Bryan, Johan.
Simon
From:
Welcome to issue 257 of the HWN, an issue covering crowd-sourced bits
of information about Haskell from around the web. This issue covers the
week of January 27 to February 02, 2013.
Quotes of the Week
* shachaf: Everyone forgets about Agda Lovelace, the first
constructivist.
*
Hi all,
some time ago me and my friend had a discussion about optimizations performed
by GHC. We wrote a
bunch of nested list comprehensions that selected objects based on their
properties (e.g. finding
products with a price higher than 50). Then we rewrote our queries in a more
efficient
You don't reason about the bits churned out by a compiler but about the
actual code you write. If you want to preserve such information during
the compilation process, you probably want to run the compiler without
any optimization flags at all.
At the moment, with the way you are thinking about
Ouch, forgot the Cafe.
Would you object to this particular optimisation (replacing an algorithm
with an entirely different one) if you were guaranteed that the space
behaviour would not change?
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This is pretty much a core idea behind Data Parallel Haskell - it
transforms nested data parallel programs into flat ones. That's
crucial to actually making it perform well and is an algorithmic
change to your program. If you can reason about your program, and
perhaps have an effective cost model
I've got a Cubieboard a few weeks back. I started it off with Linaro
(Ubuntu) 12.06.
Today I started to upgrade the OS to 12.11, which surprisingly came with
ghc 7.4.2.
And ghci magically works too.
Here are the links
http://www.cubieboard.org
sudo apt-get install update-manager-core
sudo
On Wed, Feb 6, 2013 at 1:18 PM, Austin Seipp mad@gmail.com wrote:
Now, on a slight tangent, in practice, I guess it depends on your
target market. C programs don't necessarily expose the details to make
such rich optimizations possible. And Haskell programmers generally
rely on
On Wed, Feb 6, 2013 at 6:45 AM, Jan Stolarek jan.stola...@p.lodz.pl wrote:
nevertheless I objected to his opinion, claiming that if compiler
performed such a high-level
optimization - replace underlying data structure with a different one and
turn one algorithm into
a completely different
Would you object to this particular optimisation (replacing an algorithm
with an entirely different one) if you were guaranteed that the space
behaviour would not change?
No, I wouldn't.
Janek
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You're right, somehow I didn't thought that DPH is doing exactly the same
thing. Well, I think
this is a convincing argument.
Janek
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Dear haskellers,
over the time I've read many funny or inspiring quotes related to Haskell,
but I forgot them later. For example I vaguely remember:
- What I really like about Haskell: It's completely unlike PHP.
- To learn Haskell your brain will have to get seriously rewired.
Does anybody
On Wed, Feb 6, 2013 at 5:36 PM, Petr Pudlák petr@gmail.com wrote:
Does anybody collect them or know about such a collection?
You can look at the Haskell Weekly News quote sections, or you can
download the lambdabot source repo and read the State/quote file.
--
gwern
http://www.gwern.net
I have also validated ghc 7.4.1 on the Ubuntu Precise distro booted on a
BeagleXM.
There's no ghci included.
--dude
On 02/06/2013 08:15 AM, kenny lu wrote:
I've got a Cubieboard a few weeks back. I started it off with Linaro
(Ubuntu) 12.06.
Today I started to upgrade the OS to 12.11, which
Welcome to issue 257 of the HWN, an issue covering crowd-sourced bits
of information about Haskell from around the web. This issue covers the
week of January 27 to February 02, 2013.
Quotes of the Week
* shachaf: Everyone forgets about Agda Lovelace, the first
constructivist.
*
Hello
I'm new to Haskell, and need help with figuring out the Either type...
Any example to show how this works?
Jacob
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Often, Either is used to represent, exclusively, a value or a failure, in a
more detailed way than Maybe can. For example, a function like `parse` (
http://hackage.haskell.org/packages/archive/parsec/latest/doc/html/Text-Parsec-Prim.html#v:parse),
which is part of Parsec, might have a type like:
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