A Flexible Global GCRO-DR Method for Shifted Linear Systems and General Coupled Matrix Equations

Table 4

Performance comparisons for 59319 convection-diffusion problem.

Problems		Method
		GL-GCRO-DR	FGL-GCRO-DR	GL-GMRES	FGL-GMRES	GL-GMRES-DR	FGL-GMRES-DR
Matrix 1	mvps	165	29	340	40	170	40
	T (s)	2.781e + 01	1.735e + 01	3.693e + 01	1.693e + 01	2.811e + 01	1.826e + 01
Matrix 2	mvps	172	32	340	40	190	40
	T (s)	2.655e + 01	1.766e + 01	3.664e + 01	1.686e + 01	3.115e + 01	1.824e + 01
Matrix 3	mvps	178	31	340	40	180	40
	T (s)	2.907e + 01	1.713e + 01	3.718e + 01	1.688e + 01	2.946e + 01	1.828e + 01
Matrix 4	mvps	182	34	340	40	190	40
	T (s)	3.095e + 01	1.818e + 01	3.646e + 01	1.680e + 01	3.120e + 01	1.826e + 01
Matrix 5	mvps	179	32	340	40	200	40
	T (s)	2.747e + 01	1.747e + 01	3.658e + 01	1.675e + 01	3.271e + 01	1.822e + 01