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| GMRES | 改进算法 | ||||
| N | 相对残差 | 迭代次数 | CPU计算时间 | 相对残差 | 迭代次数 | CPU计算时间 |
| 100 | 1.26 × 10−11 | 17 | 4.18 × 10−3 | 1.26 × 10−11 | 17 | 5.17 × 10−3 |
| 200 | 1.52 × 10−11 | 17 | 5.85 × 10−3 | 1.52 × 10−11 | 17 | 7.12 × 10−3 |
| 400 | 1.62 × 10−11 | 17 | 7.43 × 10−3 | 1.62 × 10−11 | 17 | 9.91 × 10−3 |
| 800 | 1.65 × 10−11 | 17 | 9.55 × 10−3 | 1.65 × 10−11 | 17 | 1.16 × 10−2 |
| 1600 | 1.67 × 10−11 | 17 | 1.77 × 10−3 | 1.67 × 10−11 | 17 | 1.71 × 10−2 |
| 3200 | 1.67 × 10−11 | 17 | 6.55 × 10−3 | 1.67 × 10−11 | 17 | 2.96 × 10−2 |