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

Table 5

Performance comparisons for 117649 convection-diffusion problem.

Problems		Method
		GL-GCRO-DR	FGL-GCRO-DR	GL-GMRES	FGL-GMRES	GL-GMRES-DR	FGL-GMRES-DR
Matrix 1	mvps	209	35	480	60	250	40
	T (s)	7.486e + 01	3.630e + 01	1.018e + 02	4.998e + 01	8.223e + 01	3.604e + 01
Matrix 2	mvps	218	36		60	240	50
	T (s)	7.660e + 01	4.006e + 01		4.988e + 01	7.876e + 01	4.536e + 01
Matrix 3	mvps	219	42		60	240	50
	T (s)	7.665e + 01	4.490e + 01		5.013e + 01	8.117e + 01	4.541e + 01
Matrix 4	mvps	242	41	480	60	270	50
	T (s)	7.664e + 01	4.396e + 01	1.026e + 02	4.977e + 01	8.795e + 01	4.545e + 01
Matrix 5	mvps	264	44	460	60	230	50
	T (s)	8.102e + 01	4.351e + 01	9.859e + 01	4.985e + 01	7.514e + 01	4.534e + 01