On Tue, May 29, 2012 at 12:52 PM, Roman Leshchinskiy r...@cse.unsw.edu.au
wrote:
On 29/05/2012, at 19:49, Evan Laforge wrote:
Good question.. I copied both to a file and tried ghc-core, but it
inlines big chunks of Data.Vector and I can't read it very well, but
it looks like the answer is
On 11/06/2012, at 18:52, Evan Laforge wrote:
On Tue, May 29, 2012 at 12:52 PM, Roman Leshchinskiy r...@cse.unsw.edu.au
wrote:
Vector should definitely fuse this, if it doesn't it's a bug. Please report
if it doesn't for you. To verify, just count the number of letrecs in the
optimised
On Mon, Jun 11, 2012 at 1:29 PM, Roman Leshchinskiy r...@cse.unsw.edu.au
wrote:
Hmm, which version of GHC and what compiler flags are you using? I'm not
familiar with ghc-core, maybe that's doing something wrong. Just run ghc -O2
-ddump-simpl and look at the output. Below is the code I'm
Good question.. I copied both to a file and tried ghc-core, but it
inlines big chunks of Data.Vector and I can't read it very well, but
it looks like the answer is no, it still builds the the list of sums.
I guess the next step is to benchmark and see how busy the gc is on
each version.
But my
On 29/05/2012, at 19:49, Evan Laforge wrote:
Good question.. I copied both to a file and tried ghc-core, but it
inlines big chunks of Data.Vector and I can't read it very well, but
it looks like the answer is no, it still builds the the list of sums.
I guess the next step is to benchmark and
On 29 May 2012 11:49, Evan Laforge qdun...@gmail.com wrote:
Good question.. I copied both to a file and tried ghc-core, but it
inlines big chunks of Data.Vector and I can't read it very well, but
it looks like the answer is no, it still builds the the list of sums.
I guess the next step is to
Have you already verified that stream fusion won't just do this for you?
On May 23, 2012 12:35 AM, Evan Laforge qdun...@gmail.com wrote:
So I wanted to find the first index in a vector whose running sum is
greater than a given number.
The straightforward way is to create the running sum and
So I wanted to find the first index in a vector whose running sum is
greater than a given number.
The straightforward way is to create the running sum and then search:
Vector.findIndex (=target) (Vector.scanl' (+) 0 vector)
But vectors are strict so it could do extra work, and what if I don't
