bugGNU Scientific Library - Bugs: bug #31109, ode-initval/bsimp is always high...

 
 

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bug #31109: ode-initval/bsimp is always high order

Submitted by:  -Deleted Account- <bjg>
Submitted on:  Thu 23 Sep 2010 01:23:29 PM UTC  
 
Category:  Performance Severity:  3 - Normal
Operating System:  Status:  Confirmed
Assigned to:  None Open/Closed:  Open
Release:  1.14

Thu 23 Sep 2010 01:23:29 PM UTC, original submission:

The bsimp_alloc() routine uses a very small EPSILON to set the order of
the integrator, and there seems to be no interface to change this.

The result is that even for small steps and large error tolerances, a
minimum of 140 function evaluations are taken per timestep. For my
application, this is more than an order of magnitude more than are
necessary.

Tom Quinn Astronomy, University of Washington
Internet: -email is unavailable-
Phone: 206-685-9009

-Deleted Account- <bjg>

 

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