Size of A

4096 ´ 4096

16384 ´ 16384

Method

Its

Time

RE

Its

Time

RE

DQMR

155

0.53

5.9674e−09

267

6.88

8.8234e−09

DGMRES

165

0.81

3.0294e−09

307

10.34

8.1578e−09