Fig. 3
Cost of the linear algebra elementary operations versus the number of degrees of freedom (d.o.f.): computation of the Jacobian matrix, construction of the ILU preconditioners (down-triangles: ILU(1), right-triangles: ILU(2), up-triangles: ILU(3)), and 20 GMRES iterations without preconditioning. Tests are performed on the stellar models. Single core computations (CPU: Intel Xeon Westmere at 2.80 Ghz).
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