Relative speed of 15C, 34S and 42S

[Thomas Okken]

(12-26-2017 11:03 AM)Paul Dale Wrote:  

(12-26-2017 08:51 AM)Dieter Wrote:  This may be not the best idea for comparing speeds since the matrix and solver algorithms may be different. This is especially true for the 34s which definitely uses its own methods.

I believe the HPs and the 34S use Doolittle's Method for LU Decompositions (matrix inversions, determinants and solving systems of equations).

I'm not sure what approach Free42 uses. The solvers are definitely different, HP used the secant method, the 34S and Free42 use Ridder's method.

The LU Decomposition code in Free42 uses Crout's Method. The code comes straight from Numerical Recipes, section 2.3.