Table 4
The number of flops performed in one iteration of the sequential (modified) split orthonormalized s-step BiCGStab and s-step BiCGStab with monomial basis, and the corresponding flops for computing s iterations of BiCGStab.
BiCGStab | s-Step BiCGStab | Split ortho s-step BiCGStab | |
---|---|---|---|
Flops | 4 nnzs + 20 ns | (8 s − 2) nnz + 32 ns2 + 44 sn + 11 n + 64 s3 + 96 s2 + 16 s − 2 |