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[Boris von Loesch <612579@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

In my Python Code I need to evaluate a nonlinear functional many times.
This was rather slow and after a profile run, I've noticed that 90% of
the time was spent in the __init__ routine of form.py to compile the
form. As far as I can survey the code, this should be necessary only
once.

I have attached a simple example that illustrates the effect. In my
test, the second code is roughly 40 times faster.

** Affects: dolfin
     Importance: Undecided
         Status: New

-- 
Huge performance problem in Python interface
https://bugs.launchpad.net/bugs/612579
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Status in DOLFIN: New

Bug description:
In my Python Code I need to evaluate a nonlinear functional many times. This was rather slow and after a profile run, I've noticed that 90% of the time was spent in the __init__ routine of form.py to compile the form. As far as I can survey the code, this should be necessary only once. 

I have attached a simple example that illustrates the effect. In my test, the second code is roughly 40 times faster.