Speed up DG FunctionSpace evalutation

Asked by Sebastian Lührs

Hi there,

today I tried some evaluation on a DG function space (Fenics 1.2.0).
In my calculations I need to use meshes with a large number of cells (~10mio).
At the moment it takes a very long time to create a DG function space (in my distinct case a vector function space) for meshes which contains many cells.
For example:

from dolfin import *
mesh = UnitCubeMesh(100,100,100)
H13 = VectorFunctionSpace(mesh, "DG", 1)

A CG function space takes around about 20 seconds for creation. For DG I aborted the job after 10 minutes. For another mesh I waited more than one hour without termination.
Is there a way to speed up the DG function space creation.

Thanks a lot in advance,

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Johannes Ring (johannr) said :

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