RE: [Doxygen-users] Doxygen Speed Issues

[Michael M. <Mic...@tt...>]

Hi Mike,

Sadly for me, I've always configured SHOW_DIRECTORIES = NO.  It's also
noticeable that with SEARCH_INCLUDES = NO the output when parsing files
flies along compared to when it is YES.

I really need to make some test cases and dig into the Doxygen source to
work out why though...

Regards,

Mike

> -----Original Message-----
> From: Mike Williams [mailto:mik...@gl...]
> Sent: 28 October 2005 15:44
> To: mik...@gl...
> Cc: Michael McTernan; 'martin sweitzer'; doxygen-
> us...@li...
> Subject: Re: [Doxygen-users] Doxygen Speed Issues
> 
> Mike Williams did utter on 28/10/2005 15:16:
> > Michael McTernan did utter on 27/10/2005 12:36:
> >
> >> Hi,
> >>
> >> I found that preprocessing can be really slow and may use much more
> >> memory.
> >> In particular the project I was building uses a lot of #includes, and I
> >> think that a number of these files contain documentation in them.
> >> It's just
> >> my suspicion, but I wondered if Doxygen was parsing the documentation
> >> in the
> >> #includes multiple times as each C input file tended to #include the
> same
> >> header files - I need more investigation to be sure.
> >>
> >>
> >>
> >> Still, setting SEARCH_INCLUDES = NO made a big difference.  With it
> >> set to
> >> NO, the documentation takes ~40 minutes to build.  With it set to YES,
> >> Doxygen ran for 8 hours before exhausting memory and stopping.
> >
> >
> > I tried first setting SEARCH_INCLUDES to NO and then removing *.h from
> > the set of input files.  Either change significantly reduced the time
> > taken but at the expense of documentation produced.
> >
> > When processing a reasonably large C project the point that seems to
> > take the vast majority of time is when Doxygen says 'Computing
> > dependencies between directories...'
> >
> > Currently we generate documentation as part of an overnight build since
> > the time taken is longer than the compilation and linking - and we don't
> > run it over the whole product yet.
> 
> Ok, stumbled upon SHOW_DIRECTORIES - setting this to NO reduces
> generation time by two thirds.  The config file is relatively historic,
> so I did a diff with a clean one generated by doxygen and found a bunch
> of new parameters - yay!
> 
> >> Regards,
> >>
> >>
> >>
> >> Mike
> >>
> >>
> >>
> >>   _____
> >> From: dox...@li...
> >> [mailto:dox...@li...] On Behalf Of martin
> >> sweitzer
> >> Sent: 27 October 2005 02:19
> >> To: dox...@li...
> >> Subject: [Doxygen-users] Doxygen Speed Issues
> >>
> >>
> >>
> >> Are there any tips / suggestions / parameters to use to speed up
> >> doxygen's
> >> generation of documentation?  :-)
> >>
> >> Currently, it takes around 35 minutes to generate the documentation
> >> for our
> >> codebase.  It takes around 10 minutes to compile it.
> >>
> >> Is there an incremental build type funtionality?
> >>
> >
> > Mike
> 
> Mike
> --
> All the world's a stage... and I got third row seats!