[petsc-users] cached values

[Justin Chang]

Hello everyone,

Pardon me if this might be a PETSc 101 question, but what exactly is meant
when routines like MatSetValues() "caches the values"? Specifically, what
happens say, after I iterate through each element within the
ComputeJacobian() routine, when I call MatAssemblyBegin/End(). If there's
documentation or a paper somewhere that explains this that would be very
helpful, because I can't seem to find anything in the PETSc manual
describing this process in detail.

Thanks,
Justin
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