On Tue, Nov 17, 2009 at 12:24 AM, Simon Peyton-Jones
wrote:
> To be honest I’m not terribly enthusiastic about trying to nail down
> exactly what’s happening in 6.10 and 6.12 because, although they are indeed
> the compilers people will be using, it’s otherwise wasted work because the
> HEAD is s
bject: Re: Inliner behaviour - tiny changes lead to huge performance
differences
On Fri, Nov 13, 2009 at 12:26 AM, Simon Peyton-Jones
mailto:simo...@microsoft.com>> wrote:
My goal is for INLINE pragmas to be very predictable. I can't decode your
message enough to offer any insights;
On Fri, Nov 13, 2009 at 12:19 AM, Roman Leshchinskiy
wrote:
Let's see if I understand this correctly. In your code, decodeUtf8 calls
> streamUtf8. They both get inlined into main but then unsafeChr8 does not.
> Correct?
>
Here's what I see in the simplifer output with 6.10.4: the
*unoptimised*bo
On Fri, Nov 13, 2009 at 12:26 AM, Simon Peyton-Jones
wrote:
> My goal is for INLINE pragmas to be very predictable. I can't decode your
> message enough to offer any insights; thank you Roman, who is closer to it,
> for helping.
>
Things are considerably different with HEAD than with 6.10.4. HE
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 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
