Re: Excessive redraw of overlapping/overlapped rows?

[YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>]

>>>>> On Mon, 26 Sep 2005 16:26:47 +0200, storm@cua.dk (Kim F. Storm) said:

> YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp> writes:
>> Is it OK to not set `changed_p' for the case of mode/header line
>> updates?

> I don't know for sure , but it seems ok.

Thanks.  I'll install the change if I (or someone who tries it) don't
find any problems for a few days.

				     YAMAMOTO Mitsuharu
				mituharu@math.s.chiba-u.ac.jp

Index: src/dispnew.c
===================================================================
RCS file: /cvsroot/emacs/emacs/src/dispnew.c,v
retrieving revision 1.356
diff -c -r1.356 dispnew.c
*** src/dispnew.c	1 Sep 2005 14:16:19 -0000	1.356
--- src/dispnew.c	26 Sep 2005 07:34:48 -0000
***************
*** 4143,4149 ****
  	  update_window_line (w, MATRIX_ROW_VPOS (mode_line_row,
  						  desired_matrix),
  			      &mouse_face_overwritten_p);
- 	  changed_p = 1;
  	}
  
        /* Find first enabled row.  Optimizations in redisplay_internal
--- 4143,4148 ----
***************
*** 4213,4219 ****
  	{
  	  header_line_row->y = 0;
  	  update_window_line (w, 0, &mouse_face_overwritten_p);
- 	  changed_p = 1;
  	}
  
        /* Fix the appearance of overlapping/overlapped rows.  */