On 01/26/2017 01:20 AM, Lam DANG wrote:
But I still a concern that the function class (the Coefficient class in step
6) will be called in many time in the main code.
Yes, but so are many other functions (e.g., FEValues::shape_grad). Is this
function *particularly* expensive in your case?
I'm asking because unless you have *concrete* evidence that something is slow,
then it's not worth changing -- in particular, if the result is code that is
more complex. There is a saying in computer science that "premature
optimization is the root of all evil", and I think there is truth to that. So,
*unless you have measured that it is a problem*, then the simplest approach is
the way to go.
Best
W.
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Wolfgang Bangerth email: bange...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/
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