Re: Fwd: w32 redisplay lags much more seriously when editing big files.

[finalpatch]

Chong Yidong <cyd <at> stupidchicken.com> writes:

> 
> David <david.boon <at> gmail.com> writes:
> 
> > I've been building the latest from CVS for a few months now.  Everytime I 
> > try
> > to run my local build, I have to stop because I can't stand the sluggish
> > refresh.  There appears to be something very wrong, but there's been very
> > little chatter about it lately. 
> >
> > I wonder if there's any status?
> 
> I have no clue what causes this bug.  If anyone on this list can share
> some ideas, no matter how vague, that would be nice.
> 
> 


i did a -pg build last night and played with the executable a bit. here's the
first few lines of the gprof output. i'm not sure if it's normal for
"mark_object" to use so many cpu cycles but i'm not familiar with the code
anyway. if anybody is interested i'll be glad to send him the complete file.

Flat profile:

Each sample counts as 0.01 seconds.
  %   cumulative   self              self     total           
 time   seconds   seconds    calls  ms/call  ms/call  name    
 22.13      0.68     0.68 28772710     0.00     0.00  mark_object
  7.87      0.92     0.24  1020457     0.00     0.00  re_match_2_internal
  7.87      1.16     0.24   219620     0.00     0.00  Fbyte_code
  3.61      1.26     0.11       44     2.50    19.57  Fgarbage_collect
  3.28      1.37     0.10  3318374     0.00     0.00  lookup_char_property
  2.46      1.44     0.07  5414804     0.00     0.00  char_table_ref
  1.97      1.50     0.06  1139532     0.00     0.00  find_interval
  1.97      1.56     0.06   368425     0.00     0.00  Fstring_equal
  1.97      1.62     0.06   174135     0.00     0.00  oblookup
  1.97      1.68     0.06    45620     0.00     0.00  re_compile_pattern
  1.64      1.73     0.05   522580     0.00     0.00  get_next_display_element
  1.64      1.78     0.05   518320     0.00     0.00  x_produce_glyphs
  1.64      1.83     0.05   476645     0.00     0.00  overlays_at
  1.64      1.88     0.05   149496     0.00     0.00  mark_vectorlike
  1.64      1.93     0.05     4820     0.01     0.03  scan_lists
  1.31      1.97     0.04  3012374     0.00     0.00  Fassq
  1.31      2.01     0.04    18081     0.00     0.01  move_it_in_display_line_to
  1.15      2.04     0.04  2094433     0.00     0.00  
multibyte_char_to_unibyte_safe
  0.98      2.08     0.03  5340008     0.00     0.00  Fcdr
  0.98      2.11     0.03  4210881     0.00     0.00  marker_position
  0.98      2.13     0.03   866237     0.00     0.00  Ffuncall
  0.98      2.17     0.03   290191     0.00     0.00  _malloc_internal_nolock
  0.98      2.19     0.03   218045     0.00     0.00  re_search_2
  0.98      2.23     0.03     5185     0.01     0.01  display_line
  0.82      2.25     0.03  1698196     0.00     0.00  specbind
  0.66      2.27     0.02  2689926     0.00     0.00  readbyte_from_file
  0.66      2.29     0.02  1182370     0.00     0.00  balance_an_interval
  0.66      2.31     0.02   657759     0.00     0.00  validate_interval_range
  0.66      2.33     0.02   500962     0.00     0.00  w32font_text_extents
  0.66      2.35     0.02   345517     0.00     0.00  sort_overlays
  0.66      2.37     0.02   265967     0.00     0.00  _free_internal_nolock
  0.66      2.39     0.02   215633     0.00     0.00  read1
  0.66      2.41     0.02   175616     0.00     0.00  update_syntax_table
  0.66      2.43     0.02   174135     0.00     0.00  hash_string
  0.66      2.45     0.02   114131     0.00     0.00  assq_no_quit
  0.66      2.47     0.02    89724     0.00     0.00  concat
  0.66      2.49     0.02    20650     0.00     0.00  stat
  0.66      2.51     0.02     3365     0.01     0.01  xrdb_get_resource
  0.49      2.52     0.01   797360     0.00     0.00  char_quoted
  0.49      2.54     0.01                             valid_lisp_object_p
  0.33      2.55     0.01  3190277     0.00     0.00  readchar
  0.33      2.56     0.01  1865738     0.00     0.00  re_iswctype