Hello,
I recently added the following autocommands to my _vimrc file:
:hi ExtraWhiteSpace ctermbg=58 " Orange4 = #5f5f00
autocmd BufWinEnter,InsertLeave * syntax match ExtraWhiteSpace /
\+\ze\t\|\t\zs \+\|^ \+\|\s\+$/ containedin=ALL
autocmd InsertEnter * syntax match ExtraWhiteSpace / \+\ze\t\|\t\zs \+\|^
\+\|\s\+\%#\@<!$/ containedin=ALL
With these autocommands in place, I noticed the response time
from vim begins to gradually degrade over time: The delay between
typing the '.' command and the screen update becomes quite
noticeable (longer than 1 second) even if the command being
repeated with '.' is simple, like inserting a single space character.
It appears that each switch into and out of insert mode (which is what
happens in a '.' command, and which is what the above autocommands
would likely affect) adds a small delay to the next '.' command that is
typed, so that after 30 or so '.' commands, the delay becomes noticeable.
I haven't looked at the source code, but my guess is that each '.' causes
vim to add an element to some list, and this ever-increasing list needs
to be traversed for each subsequent '.' command.
I found that switching to a different file and back (":e file" followed by
":e#")
solves the problem by apparently allowing vim to refresh its internal
data structures, but the problem will eventually return as more '.'
commands are typed.
Without the above buffer-switching remedy, the delay will eventually
reach about 2 to 2.5 seconds (on a 3.4 GHz Core i5), at which point,
vim will automatically "refresh itself" by disabling all syntax
highlighting,
and this removes the delay problem. My guess is that the code has
a sort of fail-safe patch that kicks in when a list gets too long.
I tested each of the above two autocommands by itself, and each
one causes the problem by itself.
Best regards,
Dave McCooey
--
--
You received this message from the "vim_dev" maillist.
Do not top-post! Type your reply below the text you are replying to.
For more information, visit http://www.vim.org/maillist.php
---
You received this message because you are subscribed to the Google Groups
"vim_dev" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To view this discussion on the web visit
https://groups.google.com/d/msgid/vim_dev/CANGAOmar9PgTNycSXm5Wx7kYZAHRvL%2BxC-MYrB%2BJU-FK%3Di%3DeTw%40mail.gmail.com.
