Hayaki Saito wrote:
> > Waiting for 100 msec is a bit long, does it also work when
> > waiting for 20 msec?
>
> No, I think 20 msec is too short for waiting for responses from terminals.
> Considering SSH session, It is required about 100 msec at least.
> The latency is almost as same as vim's "timeoutlen" option theoretically.
OK, let's keep the 100 msec value then.
> > I guess any time will do so long as we give the
> > terminal a chance to get some CPU time
>
> Please note that the second argument of mch_delay in my patch is
> FALSE, so it returns as soon as the response from terminal arrived.
> Actually, It is rare case that it takes just 100 msec.
>
> > stoptermcap() is also used for shell commands. If someone has a shell
> > command in his startup script then tcflush() might cause a problem.
> > It might help to call it only when exiting.
>
> I agree, tcflush(fileno(stdin), TCIFLUSH) has some risk of discarding
> key inputs or terminal responses.
> But I think there is more risk that T_U7 / T_CRV responses are passed
> into shell commands.
> Typically, its echo-back sequence causes "garbage output" problem, and
> T_U7 response sequence may be interpreted as <Shift-F3> by shell
> commands.
I think we should be careful. I have seen quite a few cases where
typeahead was lost, and that can be very annoying. When checking the
"exiting" flag turns out not to work well we can make another change.
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