[petsc-users] MatCopy and MatSetValue consume most 99 percentage of runtime

[Debao Shao]

Dear Petsc:

I'm trying on Petsc iterative solver(KSPCG & PCJACOBI), but it's strange that the two functions "MatCopy" and "MatSetValue" consume most of runtime, and the functions were not called frequently, just several times.

My libpetsc.a is built as follows:
1, /config/configure.py --with-mpi=0 --with-debugging=0 -with-log=0 -with-info=0
2, make all;

It's very appreciated to get your reply.

Thanks a lot,
Debao

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