On 2017-02-20, Christian Zangl wrote:
> When I press <Esc> in insert mode I have a delay of about a second before Vim
> switches to normal mode.
>
> After setting timeoutlen=0 the switch is instantaneous (also if I run vim in
> compatible mode). While the help for timeoutlen and ttimeoutlen does not
> mention escape, shouldn't ttimeoutlen be used for detecting escape? What is
> the
> reason for the delay?
>
> I was able to find a work around for insert mode (not sure about the side
> effects):
>
> augroup FastEscape
> autocmd!
> au InsertEnter * set timeoutlen=0
> au InsertLeave * set timeoutlen=1000
> augroup END
>
> Is there a better way and can I eliminate the delay in visual mode as well?
>
> (Tested with Vim 8.0.329 on Linux/Mac with/without tmux)
I suspect that you are seeing the effect of an insert-mode mapping
that begins with <Esc>. Vim is waiting 'timeoutlen' for another key
to be typed to know whether the command is the mapping or just
<Esc>. You could check this by executing
:verbose imap <Esc>
If that's the case, then I would try to change that mapping to use
something other than <Esc> as the leader.
I've seen that a few times recently myself, but I haven't tried to
track it down, and now, of course, I can't reproduce it.
Regards,
Gary
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