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Option to store geometry at quadrature points

#3

Recomputing the element Jacobian is dominated by evaluating the coordinate values at quadrature points. This accounts for almost 40% of runtime for the projection problem with no preconditioner. Storing the geometry puts more pressure on the memory bus, but should still speed things up.

Reported by Jed Brown · November 21st, 2008 @ 08:33 PM

State: resolved
Milestone: none
Assigned to: Jed Brown Jed Brown

Activity

  1. Jed Brown
    Jed Brown
    • State changed from new to resolved

    ac45dfafe23bc082bfe8395a50ce3d3d8daa9277 mostly resolves this. The floating point performance of geometry computations is very high (2.5 GFLOPS) so the cost of recomputing geometry is now fairly small. This might change with higher order parametric maps, but I doubt that it is worthwhile. The geometry computations need to be overhauled when we do higher order parametric mapping (they might get simpler).

    November 24th, 2008 @ 11:34 AM

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