Re: MPS: dangling markers

[Gerd Möllmann]

Gerd Möllmann <gerd.moellmann@gmail.com> writes:

> And that makes sense. I'll try tomorrow to add something to igc that
> Ihor can tell us how many markers there are that are allocated in the
> place Eli showed.

Can't sleep (football), so:

I ended up adding an integer parameter to build_marker, which is
different for each call site, because the markers built in marker.c
which Eli pointed to were not the problem, at least for what I did.

I start Emacs, M-x igc-stats which let's me see the number of markers.
Then repeated g to see the number of markers go up. What I see is a
rapid growth in markers, by the hundreds each time I refresh, and the
histogram looks like this

  [0 12 3039 0 8 9 19 0 0 0 47365 8 13 0 0 0 0 0 0 0 2618 2618 0 0 0 0 0
   0 0 0]

And 10 is

  DEFUN ("point-marker", Fpoint_marker, Spoint_marker, 0, 0, 0,
         doc: /* Return value of point, as a marker object.  */)
    (void)
  {
    return build_marker (current_buffer, PT, PT_BYTE, 10);
  }

Don't know who calls that, but it absolutely dominates.