[dokuwiki] Performance with many links (bug?)

I have several pages which have many links to other pages (the largest has 
about 1200). I also use the first heading for pagenames 
($conf['useheading']).

When caches have expired:
    With $conf['useheading'] = 1 it renders in about 75 seconds.
    With $conf['useheading'] = 0 it renders in 4 seconds.

Now I assume that this happens because:
    p_get_first_heading() calls p_get_metadata() which calls 
p_render_metadata() which of course takes significant time for each page.

If in p_get_first_heading() I set $render=false, the page renders quickly.

Now ... I realize I'm in over my head at this point, having not look at the 
rendering process very deeply. What would be the side effects of, for 
instance, only rendering the page if it's the current ID, by adding this to 
p_get_first_heading():
  global $ID;
  $render = $render && ($ID == $id);
Or does it need to be rendered at all?


The 75 seconds is of course unacceptable to me. Is this a bug?

Thanks,
Todd Augsburger
todd@xxxxxxxxxxxxxxxx
Roller Organs
http://www.rollerorgans.com/


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