Neil Mitchell [EMAIL PROTECTED] writes:
I want to benchmark GHC vs some other Haskell compilers, what flags
should I use?
[...] I guess the answer is -O2 -fvia-C?
I tend to use -O2, but haven't really tested it against plain -O.
From what I've seen -fvia-C is sometimes faster, sometimes
ketil+haskell:
Neil Mitchell [EMAIL PROTECTED] writes:
I want to benchmark GHC vs some other Haskell compilers, what flags
should I use?
[...] I guess the answer is -O2 -fvia-C?
I tend to use -O2, but haven't really tested it against plain -O.
From what I've seen -fvia-C is
Hi
One thing that IME makes a difference is -funbox-strict-fields. It's
probably better to use pragmas for this, though. Another thing to
consider is garbage collection RTS flags, those can sometimes make a
big difference.
I _don't_ want to speed up a particular program by modifying
Hello glasgow-haskell-users,
i have program that holds in memory a lot of strings (filenames) and
use my own packed-string library to represent these string. this
library uses newByteArray# to allocate strings. in my benchmark run
(with 300.000 filenames in memory) program prints the following
On Wed, Oct 18, 2006 at 07:00:18AM -0400, [EMAIL PROTECTED] wrote:
I'm not sure this approach is best. In my case the ... needs to be the
entire body of the shift code. It would be ridiculous to have two copies
of the same code. What would be better is a hint pragma that says,
``inline
These days -O2, which invokes the SpecConstr pass, can have a big
effect, but only on some programs.
Simon
| -Original Message-
| From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
| On Behalf Of Neil Mitchell
| Sent: 19 October 2006 11:22
| To: Donald Bruce Stewart
| Cc: GHC Users
Hello glasgow-haskell-users,
http://hackage.haskell.org/trac/ghc/wiki/Commentary
contains a link 'The old GHC Commentary' which points to the
http://www.cse.unsw.edu.au/~chak/haskell/ghc/comm/ page.
guess what this page contains? :)
it will be great to restore link to old commentaries
--
Best
On Thu, 2006-10-19 at 21:10 +0400, Bulat Ziganshin wrote:
btw, writing this message i thought that
-fconvert-strings-to-ByteStrings option will give a significant boost
to many programs without rewriting them :)
This kind of data refinement has a side condition on the strictness of
the
Pinning the arrays gives the GC much less flexibility. Especially if
your objects are small. It means that the GC can't move things to
compact the heap and you'll end up with lots of holes in between heap
objects of things that were collected but the space couldn't be re-used
because other objects
