337126 – improve dlmread() performance in =sci-mathematics/octave-3.2.4

Bug 337126 - improve dlmread() performance in =sci-mathematics/octave-3.2.4

Summary: improve dlmread() performance in =sci-mathematics/octave-3.2.4

Status:	RESOLVED FIXED

Alias:	None

Product:	Gentoo Linux
Classification:	Unclassified
Component:	Current packages (show other bugs)
Hardware:	All Linux

Importance:	High enhancement (vote)
Assignee:	Gentoo Science Mathematics related packages

URL:
Whiteboard:
Keywords:

Depends on:
Blocks:

Reported:	2010-09-13 19:45 UTC by Fabio Rossi
Modified:	2010-09-14 16:45 UTC (History)
CC List:	0 users

See Also:
Package list:
Runtime testing required:	---

Attachments
octave-3.2.4-dlmread-speedup.patch (octave-3.2.4-dlmread-speedup.patch,5.96 KB, patch) 2010-09-13 19:46 UTC, Fabio Rossi	Details \| Diff
View All Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.

Description Fabio Rossi 2010-09-13 19:45:59 UTC

Backport of the dlmread() function version in the octave development trunk. 
This patch is taken from 
  http://hg.savannah.gnu.org/hgweb/octave/rev/3d5c6b84ddaf
and increases considerably the execution speed of the function.

Here, on a Q9650 processor, the load time of a file with 4159712 lines and 5 
columns passes from 279341 seconds (yes, ~77 hours) to 14.1959 seconds. Definitely a patch to be inserted in the current stable ebuild of octave :-)

Comment 1 Fabio Rossi 2010-09-13 19:46:22 UTC

Created attachment 247167 [details, diff]
octave-3.2.4-dlmread-speedup.patch

Comment 2 Sébastien Fabbro (RETIRED) gentoo-dev

2010-09-14 16:45:46 UTC

in cvs. thanks!