Hi Frederic!

On Mi, 26 Mai 2010, Frederic Hardy wrote:

> Since patch 274, my vim/gvim is very slow, specialy when i'm editing a  
> large php file with my custom syntax file.
>
> All my vim files (.vimrc, .gvimrc, .vim) are available here :   
> http://medias.mageekbox.net/vim.tgz.
>
> There is a large php file in the tar archive to illustrate my problem.
> Use my config files and try to modify the class name or remove the  
> "abstract" keyword at line 8 to see the problem (perhaps...).
> Then i do it, my CPU usage grown to 100% and vim is frozen until i do  
> not hit <ctrl-c>.
>
> I have the problem under FreeBSD 7.1 and FreeBSD 8.
>
> This is the result of the :version command in vim :
>
> VIM - Vi IMproved 7.2 (2008 Aug 9, compiled May 26 2010 12:01:44)
> Included patches: 1-6, 8-35, 37-48, 50-70, 73, 75-87, 90-92, 94-100,  
> 102-137, 139-149, 151-171, 173-190, 192-193, 195-203, 206-211, 213-215,  
> 217-218, 220-232, 234-246, 251-259, 261-3
> 01, 303-319, 321-322, 324-335, 337-351, 353-361, 363, 366-371, 373,  
> 375-376, 378-383, 385-387, 389-398, 401-402, 404-411
> Compiled by f...@witchblade
> Big version with GTK2 GUI.  Features included (+) or not (-):
> +arabic +autocmd +balloon_eval +browse ++builtin_terms +byte_offset  
> +cindent +clientserver +clipboard +cmdline_compl +cmdline_hist  
> +cmdline_info +comments +cryptv +cscope
> +cursorshape +dialog_con_gui +diff +digraphs +dnd -ebcdic +emacs_tags  
> +eval +ex_extra +extra_search +farsi +file_in_path +find_in_path +float  
> +folding -footer +fork() -gettext
> -hangul_input +iconv +insert_expand +jumplist +keymap +langmap +libcall  
> +linebreak +lispindent +listcmds +localmap +menu +mksession  
> +modify_fname +mouse +mouseshape +mouse_dec
> -mouse_gpm -mouse_jsbterm +mouse_netterm +mouse_sysmouse +mouse_xterm  
> +multi_byte +multi_lang -mzscheme +netbeans_intg -osfiletype +path_extra  
> -perl +postscript +printer -profile
> +python +quickfix +reltime +rightleft +ruby +scrollbind +signs  
> +smartindent -sniff +startuptime +statusline -sun_workshop +syntax  
> +tag_binary +tag_old_static -tag_any_white -tcl
> +terminfo +termresponse +textobjects +title +toolbar +user_commands  
> +vertsplit +virtualedit +visual +visualextra +viminfo +vreplace  
> +wildignore +wildmenu +windows +writebackup +X11
> -xfontset +xim +xsmp_interact +xterm_clipboard -xterm_save
>    system vimrc file: "$VIM/vimrc"
>      user vimrc file: "$HOME/.vimrc"
>       user exrc file: "$HOME/.exrc"
>   system gvimrc file: "$VIM/gvimrc"
>     user gvimrc file: "$HOME/.gvimrc"
>     system menu file: "$VIMRUNTIME/menu.vim"
>   fall-back for $VIM: "/usr/local/share/vim"
> Compilation: cc -c -I. -Iproto -DHAVE_CONFIG_H -DFEAT_GUI_GTK   
> -D_THREAD_SAFE -D_REENTRANT -I/usr/local/include/gtk-2.0  
> -I/usr/local/lib/gtk-2.0/include -I/usr/local/include/atk-1.0
> -I/usr/local/include/cairo -I/usr/local/include/pango-1.0  
> -I/usr/local/include/gio-unix-2.0/ -I/usr/local/include  
> -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/u
> sr/local/include/pixman-1 -I/usr/local/include/freetype2  
> -I/usr/local/include  -O2 -pipe -march=pentium-m -fno-strict-aliasing  
> -march=pentium-m -D_FORTIFY_SOURCE=1  -I/usr/local/incl
> ude   -I/usr/local/include/python2.6 -D_THREAD_SAFE   
> -I/usr/local/lib/ruby/1.8/i386-freebsd8 -DRUBY_VERSION=18
> Linking: cc -L/usr/local/lib -L/usr/local/lib -R/usr/local/lib -L.   
> -rpath=/usr/lib:/usr/local/lib -pthread -rdynamic  -L/usr/local/lib -o  
> vim   -pthread -L/usr/local/lib -lgtk-x11-2
> .0 -lgdk-x11-2.0 -latk-1.0 -lgdk_pixbuf-2.0 -lpangocairo-1.0 -lXext  
> -lXrender -lXinerama -lXi -lXrandr -lXcursor -lXcomposite -lXdamage  
> -lpangoft2-1.0 -lgio-2.0 -lXfixes -lcairo -lpa
> ngo-1.0 -lfreetype -lfontconfig -lgobject-2.0 -lgmodule-2.0  
> -lgthread-2.0 -lglib-2.0 -lXt -pthread -ltermlib  
> -L/usr/local/lib/python2.6/config -lpython2.6 -lutil -Wl,--export-dynamic
>   -Wl,-R -Wl,/usr/local/lib -L/usr/local/lib -lruby18 -lrt -lm  
> -L/usr/lib  -rpath=/usr/lib:/usr/local/lib -pthread
>
> I known that the patch 274 is ok and that vim is slow with syntax  
> folding, but it's very annoying and i want to be sure that the problem  
> is not in my config files or in my plug-in (but i have the problem with  
> gvim -U NONE -u NONE with no .vim directory in my home).
>
> vim was compiled from FreeBSD port /editors/vim.

I can reproduce it with your provided syntax file and my debian vim 
7.2.330. I haven't looked into the syntax file in detail, but it seems 
to be the problem. Using your syntax php file and layout.php that you 
provided[1], this simple_vimrc script shows the problem:

,----
| profile start my_profile_php
| fun Profile()
|   syntax on
|   e layer.php
|   set fdm=syntax
|   "call feedkeys(":set synmaxcol=100\n", 't')
|   call feedkeys(":8d\n",'t')
|   call feedkeys("u",'t')
|   call feedkeys("zo",'t')
|   call feedkeys("dw",'t')
|   call feedkeys(":q!\n",'t')
| endfun
| 
| profile func Profile
| 
| call Profile()
`----

(Notice, that first deleting the whole fold starting at line 8 and then 
undoing the deletion will make vim unresponsive for several minutes:

c...@t41:~$ time vim -u simple_vimrc -U NONE -N
"layer.php" "layer.php" 1595L, 39500C
Press ENTER or type command to continue

real    3m4.249s
user    2m58.199s
sys     0m1.460s
c...@t41:~$

Profiling did not resolve anything special:
FUNCTION  Profile()
Called 1 time
Total time:   0.505644
 Self time:   0.390492

count  total (s)   self (s)
    1   0.079991   0.000270 | syntax on
    1   0.425550   0.390119 | e layer.php
    1              0.000023 | set fdm=syntax
                            | "call feedkeys(":set synmaxcol=100\n", 't')
    1              0.000032 | call feedkeys(":8d\n",'t')
    1              0.000006 | call feedkeys("u",'t')
    1              0.000005 | call feedkeys("zo",'t')
    1              0.000005 | call feedkeys("dw",'t')
    1              0.000005 | call feedkeys(":q!\n",'t')

FUNCTIONS SORTED ON TOTAL TIME
count  total (s)   self (s)  function
    1   0.505644   0.390492  Profile()

FUNCTIONS SORTED ON SELF TIME
count  total (s)   self (s)  function
    1   0.505644   0.390492  Profile()


If you comment out the lines 8 and 7 it works ok:

c...@t41:~$ cat simple_vimrc && time vim -u simple_vimrc -U NONE -N
profile start my_profile_php3
fun Profile()
        syntax on
        e layer.php
        set fdm=syntax
        "call feedkeys(":set synmaxcol=100\n", 't')
        "call feedkeys(":8d\n",'t')
        "call feedkeys("u",'t')
        call feedkeys("zo",'t')
        call feedkeys("dw",'t')
        call feedkeys(":q!\n",'t')
endfun

profile func Profile

call Profile()
"layer.php" "layer.php" 1595L, 39500C
Press ENTER or type command to continue

real    0m1.024s
user    0m0.900s
sys     0m0.048s

One thing that helps a little is to set synmaxcol to a much lower value:
c...@t41:~$ cat simple_vimrc && time vim -u simple_vimrc -U NONE -N
profile start my_profile_php4
fun Profile()
        syntax on
        e layer.php
        set fdm=syntax
        call feedkeys(":set synmaxcol=100\n", 't')
        call feedkeys(":8d\n",'t')
        call feedkeys("u",'t')
        call feedkeys("zo",'t')
        call feedkeys("dw",'t')
        call feedkeys(":q!\n",'t')
endfun

profile func Profile

call Profile()
"layer.php" "layer.php" 1595L, 39500C
Press ENTER or type command to continue

real    0m23.974s
user    0m23.293s
sys     0m0.216s

BTW: using the debian provided syntax files, does not show the problem:

c...@t41:~$ cat simple_vimrc && time vim -u simple_vimrc -U NONE -N
let php_folding=1
profile start my_profile_php6
fun Profile()
        syntax on
        e layer.php
        set fdm=syntax
        "call feedkeys(":set synmaxcol=100\n", 't')
        call feedkeys(":8d\n",'t')
        call feedkeys("u",'t')
        call feedkeys("zo",'t')
        call feedkeys("dw",'t')
        call feedkeys(":q!\n",'t')
endfun

profile func Profile

call Profile()
"layer.php" "layer.php" 1595L, 39500C
Press ENTER or type command to continue

real    0m3.506s
user    0m3.292s
sys     0m0.096s


[1] To make sure, I run this test as a separate user with a new ~/.vim 
directory that contains only these files:
c...@t41:~$ find .vim/
.vim/
.vim/syntax
.vim/syntax/php.vim

:scriptnames does show, that some standard plugins are loaded:
  1: /home/cb/simple_vimrc
  2: /usr/share/vim/vim72/syntax/syntax.vim
  3: /usr/share/vim/vim72/syntax/synload.vim
  4: /usr/share/vim/vim72/syntax/syncolor.vim
  5: /usr/share/vim/vim72/filetype.vim
  6: /home/cb/.vim/syntax/php.vim
  7: /usr/share/vim/vim72/syntax/php.vim
  8: /usr/share/vim/vim72/plugin/getscriptPlugin.vim
  9: /usr/share/vim/vim72/plugin/gzip.vim
 10: /usr/share/vim/vim72/plugin/matchparen.vim
 11: /usr/share/vim/vim72/plugin/netrwPlugin.vim
 12: /usr/share/vim/vim72/plugin/rrhelper.vim
 13: /usr/share/vim/vim72/plugin/spellfile.vim
 14: /usr/share/vim/vim72/plugin/tarPlugin.vim
 15: /usr/share/vim/vim72/plugin/tohtml.vim
 16: /usr/share/vim/vim72/plugin/vimballPlugin.vim
 17: /usr/share/vim/vim72/plugin/zipPlugin.vim


regards
Christian

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