91153Re: (bug) delay of 1 second after a few commands before screen gets updated
- Jun 2, 2008On 02/06/08 23:51, Dominique Pelle wrote:
> HiVIM - Vi IMproved 7.1 (2007 May 12, compiled May 29 2008 23:03:50)
> I've noticed that a couple of Vim commands have a lag (1 or 2 seconds?)
> before the screen gets updated. Here is a simple example:
> 1/ start vim in a terminal (not gvim)
> 1/ type a line of 50 i with:<esc>50ii<esc>
> 2/ notice when pressing the last<esc>, there is a delay
> of 1 to 2 seconds before the characters appear on the screen.
> Other observations
> - bug happens with Vim in a terminal (at least xterm and gnome-terminal)
> - bug does not happen with gvim.
> - bug does not happens with: 'vim -u NONE'
> - bug happens with 'vim --noplugin' and an empty ~/.vimrc
> but no longer happens when I delete the empty ~/.vimrc (which is
> very odd, what's the difference with an empty ~/.vimrc and no ~/.vimrc?)
> Can anybody else reproduce this bug too?
> I'm using Vim-7.1.305 (huge) on Linux x86.
> There are other commands which show the same delay of 1 or 2 seconds
> such as:
> - when changing till end of line with: c$foo<esc>
> - or when inserting something before visual blockwise:<ctrl-v>jjjIfoo<esc>
> -- Dominique
Included patches: 1-305
Modified by Bram Moolenaar (floating point)
Compiled by antoine.mechelynck@...
Huge version with GTK2-GNOME GUI. Features included (+) or not (-):
I can reproduce it in konsole, but only in 'nocompatible' mode -- notice
that an empty vimrc still sets that:
vim --noplugin -u /dev/null
inserts the 50 i immediately ('compatible' is on when using the -u
command-line argument), but if I retry after ":set nocp" in the same
session there is a wait of about 1 second, or maybe slightly less,
before they appear.
I don't see any wait: Insert mode is entered when I hit the dollar sign,
"foo" is entered as I type it, <esc> goes back to Normal mode.
With <block visual>Ifoo<esc> I do see it (I tried it with a somewhat
larger block, not just 3 lines by 1 column).
IIUC Vim is waiting for possible multibyte keycodes starting with Esc,
its delay is 1 second for both mappings and keycodes, as can be seen by:
:set timeout? ttimeout? timeoutlen? ttimeoutlen?
Setting 'ttimeoutlen' to 100 (1/10 s rather than 1s) makes the "strange"
behaviour disappear, because then Vim waits only 0.1s for keycodes, a
time too short to be noticed.
By doing just a little every day, you can gradually let the task
completely overwhelm you.
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