That is indeed odd. As I recall unsafeRead doesn't do array-bound checking, and
that ought to be faster, always. I don't have time to look into this myself
(soon, anyway), but
a) if someone does (look at Core!) I'd be interested to know the outcome
b) unless it turns out to be a red herring,
instead of (!) (or readArray in stateful code) helped a lot. So then I
went to optimize my gaussian elimination function and found just the
opposite. unsafeRead is slower than readArray. This struck me as very
The functions gaussElimSafe and gaussElimUnsafe are different in their
outputs
Ben Sinclair wrote:
Hello, I've had a problem with GHC.Prim when compiling the darcs HEAD
lately. When I compile it in the normal way with no special options
sh boot ./configure make make install
it compiles correctly, but if I attempt to compile
module Main where
import GHC.Prim
main
Matthias Kilian wrote:
I'm currently working on updating the GHC port to 6.6.1 for OpenBSD,
and when I run the testsuite (ghc-regress), all test cases for the
way threaded1, i.e. debug + threaded bail out with an assertion
failure:
Blocks: 132 live + 123 free = 255 total (508 around)
conc010:
You're right. I broke them when experimenting to see where the cycles
were going. I've fixed them, but the other pair of functions, named
gaussElim2, were correct and the issue remains that unsafeRead appears
slower than readArray.
I've included your implementation for comparison, as well as a
Hi Maxime,
On Sun, May 27, 2007 at 03:58:47AM +0200, Maxime Henrion wrote:
To be more precise, I want to know how to create the
ghc-$version-$arch-boot.tar.bz2 file to redistribute to users so
that they can build GHC easily, and that on a platform that already
has a working (but older) GHC
Simon Marlow on 2007-05-29 16:05:49 +0100:
Ben Sinclair wrote:
Hello, I've had a problem with GHC.Prim when compiling the darcs HEAD
lately. When I compile it in the normal way with no special options
sh boot ./configure make make install
It works for me, with last night's HEAD
On Tue, May 29, 2007 at 09:58:38PM -0400, Alec Berryman wrote:
Simon Marlow on 2007-05-29 16:05:49 +0100:
Ben Sinclair wrote:
Hello, I've had a problem with GHC.Prim when compiling the darcs HEAD
lately. When I compile it in the normal way with no special options
sh boot ./configure
