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,
-- Hernán 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.