Hi all,
I found an interesting case where the rtsopts -qm flag makes a
significant difference in runtime (~50x). This is using GHC 7.6.3, llvm 3.4,
program
compiled with "-threaded -O2 -fllvm" and a couple of language extension.
Source is at
http://benchmarksgame.alioth.debian.org/u64q/benchmark.
On Thu, Apr 04, 2013 at 06:41:19PM +0100, Edsko de Vries wrote:
> Yes please!
+1 as well. I find the current syntax too restrictive…
iustin
> On Thu, Apr 4, 2013 at 5:49 PM, Johan Tibell wrote:
>
> > Hi all,
> >
> > Haddock's current markup language leaves something to be desired once
> > you
On Sat, Feb 09, 2013 at 09:56:12AM +0100, Johan Holmquist wrote:
> As a software developer, who typically inherits code to work on rather
> than simply writing new, I see a potential of aggressive compiler
> optimizations causing trouble. It goes like this:
>
> Programmer P inherits some applicati
On Tue, Dec 04, 2012 at 03:58:24PM +0100, Herbert Valerio Riedel wrote:
> Iustin Pop writes:
>
> [...]
>
> > Let's say we have a simple JSON message: an array of 5 million numbers.
> > I would like to parse this in constant space, such that if I only need
> &g
On Tue, Dec 04, 2012 at 09:47:52AM -0500, Clark Gaebel wrote:
> Aeson is used for the very common usecase of short messages that need to be
> parsed as quickly as possible into a static structure. A lot of things are
> sacrificed to make this work, such as incremental parsing and good error
> messa
On Tue, Dec 04, 2012 at 12:23:19PM -0200, Felipe Almeida Lessa wrote:
> Aeson doesn't have an incremental parser so it'll be
> difficult/impossible to do what you want. I guess you want an
> event-based JSON parser, such as yajl [1]. I've never used this
> library, though.
Ah, I see. Thanks, I w
Hi,
I'm trying to parse a rather simple but big JSON message, but it turns
out that memory consumption is a problem, and I'm not sure what the
actual cause is.
Let's say we have a simple JSON message: an array of 5 million numbers.
I would like to parse this in constant space, such that if I only
On Mon, Nov 12, 2012 at 02:43:32PM -0800, Iavor Diatchki wrote:
> Hi,
>
> Ok, there were only minor differences between the repo and the version on
> hackage so I imported the changes into the repo, which should now be the
> same as version 1.3.7 on hackage.
> Please feel free to submit merge requ
On Mon, Nov 12, 2012 at 08:23:21PM -0500, Michael Orlitzky wrote:
> On 11/12/12 17:43, Iavor Diatchki wrote:
> > Hi,
> >
> > Ok, there were only minor differences between the repo and the version
> > on hackage so I imported the changes into the repo, which should now be
> > the same as version 1.
On Mon, Nov 12, 2012 at 10:57:25PM +0100, Iustin Pop wrote:
> On Mon, Nov 12, 2012 at 01:48:23PM -0800, Iavor Diatchki wrote:
> > Hi,
> >
> > the curl binding certainly needs some love---if anyone has the time to fix
> > it up and maintain it, help would be most apprec
On Mon, Nov 12, 2012 at 10:14:30PM +0100, Simon Hengel wrote:
> On Mon, Nov 12, 2012 at 07:21:06PM +, gra...@fatlazycat.com wrote:
> > Hi,
> >
> > Trying to find some good docs on QuickCheck, if anyone has one ?
> >
> > Been scanning what I can find, but a question.
> >
> > What would be th
On Mon, Nov 12, 2012 at 01:48:23PM -0800, Iavor Diatchki wrote:
> Hi,
>
> the curl binding certainly needs some love---if anyone has the time to fix
> it up and maintain it, help would be most appreciated. There is a repo for
> it over here: https://github.com/GaloisInc/curl which is the most up-
On Mon, Nov 05, 2012 at 02:52:56PM -0800, Johan Tibell wrote:
> Hi all,
>
> I would like to experiment with writing some modules (e.g. low-level
> modules that do a lot of bit twiddling) in a strict subset of Haskell. The
> idea is to remove boilerplate bangs (!) and instead declare the whole
> mo
On Mon, Oct 29, 2012 at 03:50:57PM +, Niklas Hambüchen wrote:
> I would prefer to completely ignore line lengths when writing Haskell.
>
> In general, giving good names to things in where-clauses automatically
> keeps my code "short enough".
>
> My opinion is that different people like differ
On Mon, Oct 29, 2012 at 05:20:20PM +0530, Rustom Mody wrote:
> There was a recent discussion on the python list regarding maximum line
> length.
> It occured to me that beautiful haskell programs tend to be plump (ie have
> long lines) compared to other languages whose programs are 'skinnier'.
> My
On Sun, Oct 28, 2012 at 05:10:39PM +0100, Changaco wrote:
> On Sun, 28 Oct 2012 16:39:10 +0100 Iustin Pop wrote:
> > Sure, but I was talking about a proper certificate signed by a
> > well-known registrar, at which point the https client would default to
> > verify the signatu
On Sun, Oct 28, 2012 at 04:26:07PM +0100, Changaco wrote:
> On Sun, 28 Oct 2012 14:45:02 +0100 Iustin Pop wrote:
> > Kindly disagree here. Ensuring that packages are downloaded
> > safely/correctly without MITM attacks is also important. Even if as an
> > option.
>
>
On Sun, Oct 28, 2012 at 03:53:04PM +0100, Petr P wrote:
> 2012/10/28 Iustin Pop :
> > On Sun, Oct 28, 2012 at 01:38:46PM +0100, Petr P wrote:
> >> does cabal need to do any authenticated stuff? For downloading
> >> packages I think HTTP is perfectly fine. So we cou
On Sun, Oct 28, 2012 at 01:38:46PM +0100, Petr P wrote:
> Erik,
>
> does cabal need to do any authenticated stuff? For downloading
> packages I think HTTP is perfectly fine. So we could have HTTP for
> cabal download only and HTTPS for everything else.
Kindly disagree here. Ensuring that packag
user to pass an Event back to the engine.
> The problem is that it seems that web-routes only accepts Strings (or some
> known types) to be passed on the web route, whereas I need to pass random
> types.
Are you sure you need to pass random types? Can't you define a (large)
set
On Sun, Oct 21, 2012 at 07:20:10PM +0200, Corentin Dupont wrote:
> Hi,
> Sorry if it was not enough explicit.
> I want to write functions like this:
>
> serialize :: (Show a) => Event a -> IO ()
> deserialize :: (Read a) => IO () -> Event a
>
> The functions would write and read the data in a fil
On Sun, Aug 19, 2012 at 06:06:53PM +0200, Iustin Pop wrote:
> On Sun, Aug 19, 2012 at 12:45:47AM -0400, Michael Orlitzky wrote:
> > On 08/18/2012 08:52 PM, Michael Orlitzky wrote:
> > > I'm one bug away from a working program and need some help. I wrote a
> > &g
On Sun, Aug 19, 2012 at 12:45:47AM -0400, Michael Orlitzky wrote:
> On 08/18/2012 08:52 PM, Michael Orlitzky wrote:
> > I'm one bug away from a working program and need some help. I wrote a
> > little utility that logs into LWN.net, retrieves an article, and creates
> > an epub out of it.
>
> I've
On Sat, Aug 18, 2012 at 08:52:00PM -0400, Michael Orlitzky wrote:
> I'm one bug away from a working program and need some help. I wrote a
> little utility that logs into LWN.net, retrieves an article, and creates
> an epub out of it. Full code here:
>
> git clone http://michael.orlitzky.com/git/
On Thu, Dec 29, 2011 at 05:55:24PM +0100, Iustin Pop wrote:
> On Thu, Dec 29, 2011 at 05:51:57PM +0100, Jerzy Karczmarczuk wrote:
> > Iustin Pop::
> > >In practice too:
> > >
> > >bar _ = do
> > >s<- readFile "/tmp/x.txt"
> >
On Thu, Dec 29, 2011 at 05:51:57PM +0100, Jerzy Karczmarczuk wrote:
> Iustin Pop::
> >In practice too:
> >
> >bar _ = do
> >s<- readFile "/tmp/x.txt"
> >return (read s)
> >
> >Once you're in a monad that has 'state&#
On Thu, Dec 29, 2011 at 07:19:17AM -0600, Gregg Reynolds wrote:
> On Wed, Dec 28, 2011 at 2:44 PM, Heinrich Apfelmus
> wrote:
> >
> > The beauty of the IO monad is that it doesn't change anything about purity.
> > Applying the function
> >
> > bar :: Int -> IO Int
> >
> > to the value 2 will alw
On Thu, Dec 29, 2011 at 12:20:18PM +, Andrew Coppin wrote:
> >>Every time I hear "oh, I don't think Windows can
> >>handle that", I sigh with resignation.
> >
> >Sorry to say, but it seems you yourself are unaware of the "extensive
> >and highly flexible" locking facilities on Linux :) The defa
On Thu, Dec 29, 2011 at 11:49:11AM +, Andrew Coppin wrote:
> On 29/12/2011 04:29 AM, Antoine Latter wrote:
> >On Wed, Dec 28, 2011 at 3:52 PM, Michael Snoyman wrote:
> >>Hi all,
> >>
> >>I just received a bug report from a client that, when an input file is
> >>open in FrameMaker, my program g
On Fri, Dec 09, 2011 at 10:30:18PM +0100, L Corbijn wrote:
> The major set of problems for using template haskell is that it
> doesn't have the correct features, or better said it tries to solve
> another problem. Template haskell generates code into an existing
> module, while for this problem the
On Wed, Oct 26, 2011 at 03:17:47PM -0400, Brent Yorgey wrote:
> I am pleased to announce that Issue 19 of The Monad.Reader, a special
> issue on parallelism and concurrency, is now available:
>
> http://themonadreader.files.wordpress.com/2011/10/issue19.pdf
Thanks a lot for the TMR, it's a plea
On Wed, Aug 24, 2011 at 04:57:19PM +0400, dokondr wrote:
> On Wed, Aug 24, 2011 at 4:44 PM, Iustin Pop wrote:
>
> > On Wed, Aug 24, 2011 at 04:35:42PM +0400, dokondr wrote:
> > > Hi,
> > > What is the Haskell way to compose functions in run-time?
> > >
On Wed, Aug 24, 2011 at 04:35:42PM +0400, dokondr wrote:
> Hi,
> What is the Haskell way to compose functions in run-time?
> Depending on configuration parameters I need to be able to compose function
> in several ways without recompilation.
> When program starts it reads configuration parameters f
On Sun, Aug 14, 2011 at 08:32:36PM +0200, Wishnu Prasetya wrote:
> On 14-8-2011 20:25, Iustin Pop wrote:
> >On Sun, Aug 14, 2011 at 08:11:36PM +0200, Wishnu Prasetya wrote:
> >>Hi guys,
> >>
> >>I'm new in parallel programming with Haskell. I made
On Sun, Aug 14, 2011 at 08:11:36PM +0200, Wishnu Prasetya wrote:
> Hi guys,
>
> I'm new in parallel programming with Haskell. I made a simple test
> program using that par combinator etc, and was a bit unhappy that it
> turns out to be slower than its sequential version. But firstly, I
> dont ful
On Thu, Jun 23, 2011 at 01:26:58PM -0400, Daniel Santa Cruz wrote:
> Lyndon,
>
> The links are minimized in hopes of making the plain text version
> somewhat readable. It is purely for aesthetical reasons. If you view
> the web version
> http://contemplatecode.blogspot.com/2011/06/haskell-weekly-n
On Sun, Feb 13, 2011 at 11:33:16PM -0800, Donn Cave wrote:
> > It is curious though that the Python community managed to agree on a
> > single implementation and include that in the standard library
>
> To me, it's more like 2 implementations, overloaded on the same
> function name.
>
> Python 2.
On Sun, Feb 13, 2011 at 11:21:42AM +0100, Henning Thielemann wrote:
>
> On Sun, 13 Feb 2011, Iustin Pop wrote:
>
> >On Sat, Feb 12, 2011 at 11:21:37AM -0500, Gwern Branwen wrote:
> >>
> >>See http://hackage.haskell.org/package/split
> >>
> >>Th
ackage.
>
> On Sun, Feb 13, 2011 at 5:50 PM, Iustin Pop wrote:
> > On Sat, Feb 12, 2011 at 11:21:37AM -0500, Gwern Branwen wrote:
> >> On Sat, Feb 12, 2011 at 11:00 AM, Robert Clausecker
> >> wrote:
> >> > Is there any reason, that one can't find a fun
On Sat, Feb 12, 2011 at 11:21:37AM -0500, Gwern Branwen wrote:
> On Sat, Feb 12, 2011 at 11:00 AM, Robert Clausecker wrote:
> > Is there any reason, that one can't find a function that splits a list
> > at a seperator in the standard library? I imagined something like this:
> >
> >
> > splitSep
On Fri, Jan 07, 2011 at 09:49:35AM -0600, John Goerzen wrote:
> On 01/07/2011 05:24 AM, Michael Snoyman wrote:
> >On Fri, Jan 7, 2011 at 11:44 AM, Iustin Pop wrote:
> >Yes, I had a bug reported in persistent-postgresql that I traced back
> >to this bug. I reported the b
Hi all,
It seems that (at least) the postgresql bindings do not allow pure
binary data.
I have a simple table:
debug=# create table test (name bytea);
byteas seems to be the backing type on the DB side for bytestrings.
and then I run this:
import Database.HDBC.PostgreSQL
import Database
On Wed, Jan 05, 2011 at 10:27:29PM +0100, Gregory Collins wrote:
> Once I had written the test harness, I spent literally less than a
> half-hour setting this up. Highly recommended, even if it is a (blech)
> Java program. Testing is one of the few areas where I think our
> "software engineering" t
Hi all,
I'm not able to find out how one can use Network.Curl with the
threaded runtime safely.
I have this simple example:
import Network.Curl
import Control.Concurrent
import Control.Concurrent.MVar
getUrl :: (Monad m) => String -> IO (m String)
getUrl url = do
(code, body) <- curlGetString
On Tue, Nov 30, 2010 at 02:16:07PM -0800, Adam Wick wrote:
> Galois, Inc. is pleased to announce the immediate release of the
> Haskell Lightweight Virtual Machine (or HaLVM), version 1.0. The
> HaLVM is a port of the GHC runtime system to the Xen hypervisor,
> allowing programmers to create Haskel
On Fri, Oct 15, 2010 at 11:08:14PM +0100, Andrew Coppin wrote:
> On 15/10/2010 10:43 PM, Iustin Pop wrote:
> >On Fri, Oct 15, 2010 at 09:28:09PM +0100, Andrew Coppin wrote:
> >>I'm surprised about the profiler. They seem really, really impressed
> >>with it. Whi
On Fri, Oct 15, 2010 at 09:28:09PM +0100, Andrew Coppin wrote:
> http://k1024.org/~iusty/papers/icfp10-haskell-reagent.pdf
>
> I'm sure some of you have seen this already. For those who lack the
> time or inclination to read through the (six) pages of this report,
> here's the summary...
Nice su
On Fri, Apr 23, 2010 at 12:14:29AM +0200, Jesper Louis Andersen wrote:
> Hi,
>
> I am asking if anyone has seen the following behaviour from GHC under
> -threaded and heavy use of File I/O, network I/O and STM use. After
> having run Combinatorrent for a while and then terminating it, we get
> the
On Fri, Apr 09, 2010 at 09:07:29AM -0700, Bryan O'Sullivan wrote:
> On Fri, Apr 9, 2010 at 6:44 AM, Ivan Lazar Miljenovic <
> ivan.miljeno...@gmail.com> wrote:
>
> >
> > As of 6.12.1, the new -fwarn-unused-do-bind warning is activated with
> > -Wall. This is based off a bug report by Neil Mitchel
On Thu, Apr 01, 2010 at 05:25:44PM +0100, Thomas Schilling wrote:
> Do you perhaps have some text that run into the margins? If I have
> references of the form "Longname~\emph{et~al.}~\cite{foobar}" Latex
> does not know how to split this up the text extends into the margins.
> A similar problem m
This is off-topic, apologies in advance, but I hope people here have
experience with this.
I submitted a paper for ICFP but the paper checker says: “Margins too
small: text block bigger than maximum 7in x 9in on pages 1–6 by 4–5% in
at least one dimension”.
Now, I've used the standard class file
On Tue, Mar 23, 2010 at 11:22:23AM -0700, Bryan O'Sullivan wrote:
> 2010/3/23 Iustin Pop
>
> > I agree with the principle of correctness, but let's be honest - it's
> > (many) orders of magnitude between ByteString and String and Text, not
> > just a few
On Tue, Mar 23, 2010 at 03:31:33PM -0400, Nick Bowler wrote:
> On 18:25 Tue 23 Mar , Iustin Pop wrote:
> > On Tue, Mar 23, 2010 at 01:21:49PM -0400, Nick Bowler wrote:
> > > On 18:11 Tue 23 Mar , Iustin Pop wrote:
> > > > I agree with the principle of co
On Tue, Mar 23, 2010 at 05:53:00PM +, Vincent Hanquez wrote:
> On 23/03/10 17:11, Iustin Pop wrote:
> >Data.ByteString.Lazy (bytestring readFile + length) -< 10 miliseconds,
> >incorrect length (as expected).
> >
> >Data.ByteString.Lazy.UTF8 (system readFi
On Tue, Mar 23, 2010 at 01:21:49PM -0400, Nick Bowler wrote:
> On 18:11 Tue 23 Mar , Iustin Pop wrote:
> > I agree with the principle of correctness, but let's be honest - it's
> > (many) orders of magnitude between ByteString and String and Text, not
> &g
On Tue, Mar 23, 2010 at 08:51:16AM -0700, John Millikin wrote:
> On Tue, Mar 23, 2010 at 00:27, Johann Höchtl wrote:
> > How are ByteStrings (Lazy, UTF8) and Data.Text meant to co-exist? When I
> > read bytestrings over a socket which happens to be UTF16-LE encoded and
> > identify a fitting funct
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