I've tried:
$ cabal install --only-dependencies -w
/usr/local/bin/ghc-7.10.0.20141222 --enable-tests --enable-benchmarks
--ghc-option=-fllvm --ghc-option=-static
$ cabal configure -w /usr/local/bin/ghc-7.10.0.20141222
--enable-tests --enable-benchmarks --ghc-option=-fllvm
The `primitive` package exports a lifted version of the undocumented `touch#`
http://hackage.haskell.org/package/ghc-prim-0.3.1.0/docs/GHC-Prim.html
which has type:
touch :: PrimMonad m = a - m ()
I'd like to know if this works correctly in general, or will it suffer
from the same
In my tests, using calloc from:
https://hackage.haskell.org/package/missing-foreign-0.1.1/docs/Foreign-Marshal-MissingAlloc.html
was about twice as fast as allocating and zeroing the same amount of
memory with `newByteArray` + any of `copy/set/fillMutableByteArray`
(all three were nearly
I have what may sound like an unusual request: I would like to
automatically avoid `BlockedIndefinitelyOnSTM` exceptions with a
primitive that looks something like this:
Have you seen ezyang's post here? Lots of hairy details that are
probably relevant
)'
won't fly for overlap reasons though.
-Edward
On Mon, Jul 14, 2014 at 6:55 PM, Brandon Simmons
brandon.m.simm...@gmail.com wrote:
It seems to me that this should be true for all `f a` like:
instance (Monoid a, Applicative f)= Monoid (f a) where
mappend = liftA2 mappend
It seems to me that this should be true for all `f a` like:
instance (Monoid a, Applicative f)= Monoid (f a) where
mappend = liftA2 mappend
mempty = pure mempty
But I can't seem to find the particular `instance (Monoid a)= Monoid
(IO a)` anywhere. Would that instance be incorrect,
On Mon, May 12, 2014 at 4:32 AM, Simon Marlow marlo...@gmail.com wrote:
On 09/05/2014 19:21, Brandon Simmons wrote:
A couple of updates: Edward Yang responded here, confirming the sort
of track I was thinking on:
http://blog.ezyang.com/2014/05/ghc-and-mutable-arrays-a-dirty-little-secret
A couple of updates: Edward Yang responded here, confirming the sort
of track I was thinking on:
http://blog.ezyang.com/2014/05/ghc-and-mutable-arrays-a-dirty-little-secret/
And I can report that:
1) cloning a frozen array doesn't provide the benefits of creating a
new array and freezing
On May 9, 2014 5:13 PM, Edward Z. Yang ezy...@mit.edu wrote:
Hello Brandon,
Excerpts from Brandon Simmons's message of 2014-05-08 16:18:48 -0700:
I have an unusual application with some unusual performance problems
and I'm trying to understand how I might use unsafeFreezeArray to help
I have an unusual application with some unusual performance problems
and I'm trying to understand how I might use unsafeFreezeArray to help
me, as well as understand in detail what's going on with boxed mutable
arrays and GC. I'm using the interface from 'primitive' below.
First some basic
On Sat, Aug 4, 2012 at 6:22 AM, Dan Doel dan.d...@gmail.com wrote:
On Aug 3, 2012 11:13 PM, Brandon Simmons brandon.m.simm...@gmail.com
wrote:
In particular I don't fully understand why these sorts of contortions...
http://hackage.haskell.org/packages/archive/base/latest/doc/html/src/GHC
I've been wondering for some time about the details of how GHC uses
syntax with inlining, and how other transformations come into play in
the process (I recently asked a question on SO if anyone wants some
karma: http://stackoverflow.com/q/11690146/176841). I know this is a
big topic and there's
On Tue, Jul 26, 2011 at 1:25 AM, Edward Z. Yang ezy...@mit.edu wrote:
Hello Brandon,
The answer is subtle, and has to do with what references are kept in code,
which make an object considered reachable. Essentially, the main thread
itself keeps the MVar live while it still has forking to do,
On Sun, Jul 24, 2011 at 10:02 PM, Felipe Almeida Lessa
felipe.le...@gmail.com wrote:
On Sun, Jul 24, 2011 at 7:56 PM, Brandon Simmons
brandon.m.simm...@gmail.com wrote:
What I think I've learned here is that the BlockedIndefinitelyOnMVar
exception is raised in all the blocked threads at once
On Sun, Jul 24, 2011 at 10:07 PM, Edward Z. Yang ezy...@mit.edu wrote:
Excerpts from Felipe Almeida Lessa's message of Sun Jul 24 22:02:36 -0400
2011:
Does anything change if you somehow force a GC sometime after good2?
Perhaps with some calculation generating garbage, perhaps with
anyone comment on the two conclusions above?
FWIW, this was an interesting related thread:
http://comments.gmane.org/gmane.comp.lang.haskell.glasgow.user/18667
Thanks,
Brandon Simmons
http://coder.bsimmons.name
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