[petsc-users] compare: performance of petsc_3.3p2 and petsc_dev-r24197

[Feng Li]

The performance of petsc_3.3p2 is five times faster than petsc_dev-r24197.
Why?

It is tested with pflotran example problem 100x100x100.
config parameter：--with-mpi=0 --CC=gcc --FC=gfortran --CCFLAGS="-g -O2"
--FCFLAGS="-g -O2" --blas-lapack-dir=$MKLROOT

detail time:
                      petsc_3.3p2          petsc_dev24197
walltime(sec)        28.116                 110.25

Thank you!
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