On Friday 30 October 2009 5:51:37 am Simon Peyton-Jones wrote:
> One more update about GHC 6.12, concerning impredicative polymorphism.
>
> GHC has had an experimental implementation of impredicative polymorphism
> for a year or two now (flag -XImpredicativePolymorphism). But
>
> a) The implem
On Fri, Nov 13, 2009 at 2:04 AM, Bryan O'Sullivan wrote:
>
> And the lengthI function is defined more generally, in the hope that I could
> use it for both Int and Int64 lengths:
>
> lengthI :: Integral a => Stream Char -> a
> lengthI (Stream next s0 _len) = loop_length 0 s0
> where
> lo
On Fri, 2009-11-13 at 17:18 +0300, Daniil Elovkov wrote:
> > Did you use "-auto-all", to automatically create cost centers for all
> > top-level functions? I find that I get very verbose cost info for
> > definitions under imported libraries.
>
> Yeah, I've got it. Modules in packages were done
Hello Simon,
Friday, November 13, 2009, 4:43:34 PM, you wrote:
> I think I can explain this one, at least partially. When you mark a
> function INLINE, GHC does not optimise the body of the function itself,
> on the grounds that it will be inlined at the call site anyway and get
> optimised ther
John Dorsey wrote:
Daniil,
While you're waiting for an answer from a GHC internals expert, here's my
experience as a fellow user.
1) Can I profile my program if I don't have all the libraries it depends
on compiled with profiling?
I don't know how to do that, and I don't know how to automat
On 13/11/2009 07:04, Bryan O'Sullivan wrote:
I'm working on measuring and improving the performance of the text
library at the moment, and the very first test I tried demonstrated a
piece of behaviour that I'm not completely able to understand. Actually,
I'm not able to understand what's going on
Bryan
| I'm working on measuring and improving the performance of the text library at
the
| moment, and the very first test I tried demonstrated a piece of behaviour
| that I'm not completely able to understand. Actually, I'm not able to
| understand what's going on at all, beyond a very shall
On 13/11/2009, at 18:04, Bryan O'Sullivan wrote:
main = do
args <- getArgs
forM_ args $ \a -> do
s <- B.readFile a
let t = T.decodeUtf8 s
print (T.length t)
The streamUtf8 function looks roughly like this:
streamUtf8 :: OnDecodeError -> ByteString -> Stream Char
streamUtf8 onEr
| > 1) Can I profile my program if I don't have all the libraries it depends
| > on compiled with profiling?
I'm afraid not. It's one of the shortcomings of GHC's profiler, but it's hard
to overcome.
Simon
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