When Cactus builds PETSc from the sources included in ExternalLibraries/PETSc it currently uses PETSc’s default build options which create a debug build, which is not giving good performance.

Pull request https://github.com/EinsteinToolkit/ExternalLibraries-PETSc/pull/2 makes Cactus build an optimized version unless DEBUG=yes is set.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2472/petsc-build-optimized-library-unless-debug