dolfin team mailing list archive

["Martin Sandve Alnæs" <martinal@xxxxxxxxx>]

2008/6/3 Anders Logg <logg@xxxxxxxxx>:
> On Sun, Jun 01, 2008 at 12:21:37AM +0200, Johan Hake wrote:
>> On Saturday 31 May 2008 23:10:05 DOLFIN wrote:
>> > One or more new changesets pushed to the primary dolfin repository.
>> > A short summary of the last three changesets is included below.
>> >
>> > changeset:   4271:8431a991a0be07ead18512308cf293a309d4b2a5
>> > tag:         tip
>> > user:        Anders Logg <logg@xxxxxxxxx>
>> > date:        Sat May 31 23:09:58 2008 +0200
>> > files:       demo/mesh/ale/cpp/main.cpp demo/mesh/ale/python/demo.py
>> > dolfin/parameter/DefaultParameters.h site-packages/dolfin/assemble.py
>> > description:
>> > Several Python assembly optimizations and new options:
>> > The following options are now available:
>> >
>> >   dolfin_set("optimize form", True)              # Use optimization -O2
>> > when compiling generated code dolfin_set("optimize use dof map cache",
>> > True) # Store dof maps in cache for reuse dolfin_set("optimize use tensor
>> > cache", True)  # Store tensors in cache for reuse
>> >
>> >   dolfin_set("optimize", True)                   # All of the above
>> >
>> > Each one of these may make a significant difference for the
>> > speed of assembly from Python, in particular for repeated
>> > assembly.
>> >
>> > With these options set, the difference in speed between assembly
>> > in C++ and Python using the JIT compiler is negligible. (For forms
>> > which don't depend on functions that are evaluated in Python.)
>>
>> Nice features!
>>
>> It would be nice to be able to use inlined and just in time compiled c++
>> functions, avoiding the time consuming python callback functions.
>>
>> Johan
>
> This is possible (Martin does it), but I don't know how.
>
> Martin, is it be easy to do this directly from DOLFIN (with FFC) or
> does it depend on SyFi?
>
> --
> Anders

It's easy with some helper functions I have, I can show you tomorrow.
It only depends on dolfin::Function (i.e. dolfin.cpp_Function) and Instant.

--
Martin