Hi Benoit,

I've loaded the package but it seems the port is not complete, i.e. if
you evaluate:

DhbMatrix new: 10

you will get a MessageNotUnderstood: Interval>>asVector because
extension methods were not ported. I uploaded to the SqueakSource a
new version including extension methods and now most tests pass.

Concerning the performance issues, I've narrowed my code to only
measure the writing and reading of a matrix of 710500 elements,
resulting in 58239 milliseconds for the native Matrix implementation
and 56920 for DhbMatrix.
It seems my performance problem involves reading and parsing a "CSV" file

Elements Matrix DhbMatrix
53400 � 18274 � 17329
175960 �61043 � 60722
710500 �379276 �385278

I will check if it's worth to implement a primitive for very fast
parsing of CSV files.
Cheers,

2010/12/5 Benoit St-Jean <bstjean@hotmail.ca>:

> Have you tried the matrix implementation in the numerical package from
> Didier H. Besset?
>
> http://squeaksource.com/@Q45T_l348Ag07gGT/VMsGzidC
>
>
>
>
> -----------------
> Benoit St-Jean
> A standpoint is an intellectual horizon of radius zero.
> (Albert Einstein)
>
>
>
>
>> Date: Sun, 5 Dec 2010 17:33:17 -0300
>> From: hernan.morales@gmail.com
>> To: pharo-users@lists.gforge.inria.fr
>> Subject: [Pharo-users] Fastest matrix implementation?
>>
>> Hi list
>>
>> In the context of a scientific project here we are building big
>> matrices for later processing, mostly exporting to custom file formats
>> for PLINK, HaploView, etc (bioinformatics tools). I've tested one of
>> our scripts in both Pharo 1.1 (not CogVM) with the corresponding
>> Python 2.6 implementation (without PyPy), and the performance in
>> Python was superior, about 8x faster than ST.
>> So I wonder if anyone knows the fastest (or a faster) implementation
>> of Matrix than the included by default in Collections?
>>
>> Cheers,
>>

--
Hern�n Morales
Information Technology Manager,
Institute of Veterinary Genetics.
National Scientific and Technical Research Council (CONICET).
La Plata (1900), Buenos Aires, Argentina.
Telephone: +54 (0221) 421-1799.
Internal: 422
Fax: 425-7980 or 421-1799.