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## [Octave-bug-tracker] [bug #53140] Solution of a system of linear equatio

**From**: |
Marco Caliari |

**Subject**: |
[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance. |

**Date**: |
Tue, 27 Feb 2018 03:14:21 -0500 (EST) |

**User-agent**: |
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:58.0) Gecko/20100101 Firefox/58.0 |

Follow-up Comment #21, bug #53140 (project octave):
I see something strange (to me): if I declare
OCTAVE_LOCAL_BUFFER (double, Bx, b_nr);
OCTAVE_LOCAL_BUFFER (double, Xx, b_nr);
OCTAVE_LOCAL_BUFFER (double, W, b_nr);
OCTAVE_LOCAL_BUFFER (octave_idx_type, Wi, b_nr);
I do not see any improvement. On the other hand, with
OCTAVE_LOCAL_BUFFER (double, Bx, b_nr);
OCTAVE_LOCAL_BUFFER (double, W, b_nr);
OCTAVE_LOCAL_BUFFER (octave_idx_type, Wi, b_nr);
OCTAVE_LOCAL_BUFFER (double, Xx, b_nr);
I see the reduction from about 55 seconds to 40. Does it make sense?
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**[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance.**, *(continued)*
**[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance.**, *Rik*, `2018/02/19`
**[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance.**, *Rik*, `2018/02/19`
**[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance.**, *Rik*, `2018/02/19`
**[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance.**, *Rik*, `2018/02/19`
**[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance.**, *Marco Caliari*, `2018/02/20`
**[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance.**, *Rik*, `2018/02/20`
**[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance.**, *Marco Caliari*, `2018/02/21`
**[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance.**, *Marco Caliari*, `2018/02/23`
**[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance.**, *John W. Eaton*, `2018/02/23`
**[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance.**, *Rik*, `2018/02/26`
**[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance.**,
*Marco Caliari* **<=**
**[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance.**, *John W. Eaton*, `2018/02/27`
**[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance.**, *Rik*, `2018/02/27`
**[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance.**, *Marco Caliari*, `2018/02/27`
**[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance.**, *Rik*, `2018/02/27`
**[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance.**, *Marco Caliari*, `2018/02/28`
**[Octave-bug-tracker] [bug #53140] Solution of a system of linear equations takes forever and hurts OS performance.**, *Rik*, `2018/02/28`