[Bug 320700] Re: gvim rendering is slow

[Paul White]

Thank you for taking the time to report this bug and helping to make
Ubuntu better. We are sorry that we do not always have the capacity to
review all reported bugs in a timely manner.

I'm setting the status of this bug to 'Incomplete' as it's not seen any
activity for some time. If this is still an issue while using a
currently maintained release of Ubuntu then please let us know which
one(s) otherwise this bug report can be left to expire in approximately
60 days time.

** Changed in: vim (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/320700

Title:
  gvim rendering is slow

Status in vim package in Ubuntu:
  Incomplete

Bug description:
  Binary package hint: vim

  Rendering in gvim is very slow compared to previous Ubuntu releases.
  It's usable, but takes patience. I'm using vim/gvim 7.1.314-3ubuntu3.1
  on Ubuntu 8.10.

  Others have reported this same issue on a thread from the vim mailing list. Many solutions have been tried w/o success:
  http://groups.google.com/group/vim_use/browse_thread/thread/dd1d8d9a799adf4a

  From the thread, someone provided this benchmark script:
  -- -- --
  " Benchmark vim's redrawing speed
  let i = 0
  while i < 2000
    1
    redraw
    $
    redraw
    let i = i + 1
  endwhile
  qa!
  -- -- --

  I've run it with /etc/init.d/README as an input file (just to pick
  something consistent across Ubuntu machines):

  $ time vim -u NONE -U NONE  -S test-redraw-speed.vim /etc/init.d/README 
  real	0m5.407s
  user	0m0.568s
  sys	0m0.048s

  $ time gvim -u NONE -U NONE -f -S test-redraw-speed.vim /etc/init.d/README 
  real	3m27.614s
  user	0m11.685s
  sys	0m0.312s

  As you can see gvim is almost 40x slower then vim (running in gnome-
  terminal). You'd expect gvim to be slower then vim, but not by this
  much. Note, from the thread, not all users experience this huge
  difference. Some only report 2-3x slowdown, which I'd be very happy
  with at this point :)

  I'm using the radeon X11 driver (open source) on a ThinkPad T42p, and
  do _not_ experience slow rendering in other apps (for example, gedit).

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