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Re: [Bug-gsl] Bug-gsl Digest, Vol 99, Issue 6


From: James Ward
Subject: Re: [Bug-gsl] Bug-gsl Digest, Vol 99, Issue 6
Date: Tue, 12 Apr 2011 18:33:04 -0400

I did some timing tests, and it looks like Moler & Morrision is about
twice as slow as gsl_hypot(), up to the same accuracy (1e-15).

http://steve.hollasch.net/cgindex/math/pythag-root.txt

suggests this is due to M&M being cubically convergent, while
gsl_hypot() is quadratically convergent. So ... never mind!

Jim Ward

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