[petsc-users] Some routines are very expensive, such as DMPlexGetSupport and DMPlexPointLocalRef.

[leejearl]

Hi, all PETSc developer:

     Thank you for your great works. I have deploy my fvm code based on 
the PETSc.
It works well, and the results are beautiful. But I found a problem that 
some of the
functions, such as DMPlexGetSupport and DMPlexPointLocalRef, are very 
expensive. 
<http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/DM/DMPlexPointLocalRef.html>
It costs a lot of times if such routines are involved. Is there any 
method one can use to reduce
the time costs and improve the efficiency of the executable applications?
      Thanks
leejearl

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