[petsc-users] MatAssemblyBegin-End

[Bernardo Rocha]

Hi everyone,

I've a simple question: I'm solving successive linear systems, and the way
I've implemented my problem it calls MatAssemblyBegin and MatAssemblyEnd
every time before the call to KSPSolve. The sparsity pattern of my matrix
does not change between the calls. Is it necessary to call the pair
MatAssemblyBegin/End every time? If it is not necessary, do these routines
check if I've already assembled the matrices or not? Does it hurt
performance if I do so?

Thanks.
Best regards,
Bernardo M. R.
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