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Re: gsl_multifit

To: Kai Trukenmueller <trukenm at ag2 dot mechanik dot tu-darmstadt dot de>
Subject: Re: gsl_multifit
From: Brian Gough <bjg at network-theory dot co dot uk>
Date: Thu, 18 Oct 2001 20:40:47 +0100 (BST)
Cc: gsl-discuss at sources dot redhat dot com
References: <4DFD94A38EB3104E838576A77AEBB36E166DC2@hermes.mathcore.se><20011018182055.A2874@abb121.ram1st.wh.tu-darmstadt.de>

Kai Trukenmueller writes:
 > Thanks for the tip. It's much faster now, but still slower than octave.
 > 
 > Order:	(300,200)  (600,400)  (900,600)  (1200,1000)  (1500,1200)
 > Octave:  0.340s     3.320s     11.580s    1m9.680s    2m1.090s
 > gsl(QR): 0.390s     4.560s     22.690s    1m38.640s   5m1.580s

For extra speed try recompiling the library with -DGSL_RANGE_CHECK_OFF=1.
Range checking is currently enabled by default, for safety, and puts an
overhead on every matrix/vector operation.

Follow-Ups:
- Re: gsl_multifit
  - From: Henry Sobotka

References:
- RE: gsl_multifit
  - From: Mikael Adlers
- Re: gsl_multifit
  - From: Kai Trukenmueller

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