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OpenFoam Recompile, successful but test is slow

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Old   January 15, 2010, 21:15
Default OpenFoam Recompile, successful but test is slow
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Steve Colde
Join Date: Jan 2010
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I downloaded openfoam source tar ball and thirdparty tar.
just modify mpi to hpmpi (bashrc, setting.sh), and run ./Allwmake to compile everything.

It is successful, then I run cavity test, it is much much slower than binary from OpenFoam website (openmpi based).

What can be the reason?

Even I recompiled with my own openmpi, it is also very very slow too.
I don't understand the difference. MPI library shouldn't contribute that much (>100 times slower)
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