Re: Changing the defaults with Vim 8

Hi Michael,

2016-8-21(Sun) 21:58:54 UTC+9 Michael Henry:
> On 08/20/2016 01:22 PM, Bram Moolenaar wrote:
> > Hirohito Higashi wrote:
> >> `set ttimeoutlen=0` will solve the above.
> >>
> >> I have invested in above setting more than a year, but the
> >> trouble does not happen even once.
> >
> > Zero only works when you are directly using a terminal. When
> > using a remote shell it might not work properly. But one
> > second is indeed too much.
> >
> > I have it set to 200, this still has some lag. I think 100
> > would work for just about everyone.
>
> I ran for a long time without trouble using 50 milliseconds.
> But even this eventually proved too long once I began using
> Alt-letter mappings in console Vim. The key sequence for Alt-j
> is <Esc>j. I would frequently press <Esc> to exit insert mode
> followed quickly by the j key, and Vim would misinterpret the
> sequence as Alt-j (which would then invoke my insert-mode
> mapping for Alt-j). I found experimentally that I could set
> ttimeoutlen to 5 to avoid most instances of this kind of
> incorrect key interpretation. This value has never proved to be
> too small in my use. I've never noticed a case of Vim timing
> out in the middle of a valid multi-key sequence and splitting it
> incorrectly into multiple keypresses, even when using Vim across
> an SSH connection; however, these connections were typically
> done over a local Ethernet, so on a slower network it's possible
> that such splitting could occur (such that Alt-j might be split
> erroneously into <Esc> followed by j). I consider this an
> unlikely case, since the multi-key sequence will probably be
> written to the network as a unit and carried in a single network
> packet, regardless of the speed of the network; still, until we
> start using uniquely decodable key sequences so we don't have to
> rely on timeouts, there will always be some risk of incorrect
> key interpretation.
>
> I think 100ms is better than 200ms as a default. I wouldn't
> suggest a default as low as 5ms due to the possible risk of
> misinterpreting multi-byte key sequences, even though I've never
> personally noticed such a failure. Users like myself who
> require shorter values can always override the default. I'll
> also note that I've seen 100ms used elsewhere, such as in Tim
> Pope's "Sensible Defaults" plugin:
> https://github.com/tpope/vim-sensible/blob/master/plugin/sensible.vim#L28

Thanks for the reply.
`set ttimeoutlen=100` is already included at patch 7.4.2232.
https://github.com/vim/vim/commit/e07e797db0c5ef1aafc650d8bb0d39fb052cf1e1

I think "100" is enough as the default.
I might be okay with a smaller value, I think that it would be changed in the individual.
--
Best regards,
Hirohito Higashi (a.k.a. h_east)

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