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Improve run time of convertToLinearMesh

Tom Fischer requested to merge TomFischer/ogs:AccelerateConvertToLinearMesh2 into master
  • Substitute geometrical search by a mapping that is calculated by known information before creating the linear elements
  • Store the result of the expensive to calculate getNumberOfBaseNodes() once and re-use it

Update

Forget to mention: Run time for a test example from @joergbuchwald reduced from 5400 s to 0.5 s.

Edited by Tom Fischer

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