Dear Wolfgang and Jean-Paul Thank you for your deeply supports and I am clear now
I would close this topic. On Thursday, January 26, 2017 at 3:33:15 PM UTC+1, Wolfgang Bangerth wrote: > > 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? > The function class is duplicated in my code because I use the iterative method for modeling a coupled hydro mechanical behavior. It means the equations of hydraulics and mechanics will be solved sequentially. > 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. > > -- > ------------------------------------------------------------------------ > Wolfgang Bangerth email: bang...@colostate.edu > <javascript:> > www: http://www.math.colostate.edu/~bangerth/ > > -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
