[pygccxml-development] Performance problems and fixes

[Allen B. <al...@vr...>]

Today I ran my generation script through the python hotspot profiler and 
found some interesting results.

The majority of the time was being spent in algorithm.declaration_path.  
I fixed this up and double the speed of my script. :)

After that I decided it may be worth investigating some other spots.  
What I have found is that the following areas are consuming a lot of 
time.  (not sure if it can be fixed or not, but this is where the time 
is spent)

(all of these are in pygccxml)
- Getting names from declarations
- Testing declarations and calldefs for equality
- Getting the decl_string (and creating it) for cpptypes.

declarations.py  _get_name  line 151
class_declarations.py _get_name_impl    line 105
declaration.py  _eq_   line 119
calldef.py  _eq_  line 121 and 53
cpptypes.py  _get_decl_string   line 37
algorithm.py   full_name   line 30

Once I get into the office tomorrow I will upload my hotspot trace so 
other people can see what I ran into and hopefully find some other 
places to improve the performance of py++. :)

-Allen