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From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Leo Liu <sdl.web@gmail.com>
Cc: 11906@debbugs.gnu.org
Subject: bug#11906: 24.1; completion-at-point failures
Date: Fri, 10 May 2013 23:40:39 -0400	[thread overview]
Message-ID: <jwv7gj69oif.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <m1d2syb7yk.fsf@gmail.com> (Leo Liu's message of "Sat, 11 May 2013 09:50:43 +0800")

>> The difference between 2 and 3 calls shouldn't be sufficiently large to
>> go from "acceptable" to "terrible delay".
> It is a difference between 1 and 3 calls because a user can also run
> octave in terminal and find that how responsive it actually is.

But the generic completion code can't easily go down to a single call in
the general case.

> I think if completion-at-point can work well when there is a 2-second
> cost in a completion-at-point function, it can provide an excellent
> experience.

Obviously it can, via caching.  Most completion tables which incur
a significant computation code should use caching, but we can't use
caching unconditionally, because it's hard to come up with a general
conditions under which the cache can be reused or needs to be flushed.

As mentioned, we could try and provide a generic completion-table cache
so as to make it easier to write completion tables that have
a significant computation cost.  Patches welcome.


        Stefan





  reply	other threads:[~2013-05-11  3:40 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-11  5:54 bug#11906: 24.1; completion-at-point failures Leo
2012-07-12 14:00 ` Stefan Monnier
2013-05-10  6:38   ` Leo Liu
2013-05-10 20:36     ` Stefan Monnier
2013-05-11  1:50       ` Leo Liu
2013-05-11  3:40         ` Stefan Monnier [this message]
2013-05-11  4:47           ` Leo Liu
2013-05-11 14:51             ` Stefan Monnier
2013-05-13  1:28               ` Leo Liu
2013-05-13 15:27                 ` Stefan Monnier
2013-05-14  0:56                   ` Leo Liu
2013-05-14  2:53                     ` Stefan Monnier
2013-05-14  3:30                       ` Leo Liu
2013-05-11 20:18             ` Andreas Röhler
2013-05-11 23:11           ` Daimrod
2013-05-13 15:28             ` Stefan Monnier
2013-05-21 23:39           ` Dmitry Gutov
2013-05-22 19:16             ` Stefan Monnier
2013-12-05  3:23               ` Dmitry Gutov
2013-12-05  4:33                 ` Stefan Monnier
2013-12-06  1:02                   ` Dmitry Gutov
2013-12-06  4:00                     ` Leo Liu
2013-12-06  4:32                       ` Dmitry Gutov
2013-12-06  5:36                         ` Leo Liu
2013-12-06 13:15                           ` Dmitry Gutov
2013-12-06 14:04                             ` Leo Liu
2013-12-06 17:35                               ` Stefan Monnier
2013-12-07  2:05                                 ` Leo Liu
2013-12-07 22:45                                   ` Stefan Monnier
2013-12-06 17:36                               ` Stefan Monnier
2013-12-07  2:02                               ` Dmitry Gutov
2013-12-07  2:40                                 ` Leo Liu
2013-12-07 16:13                                   ` Dmitry Gutov
2013-12-09  2:27                                     ` Leo Liu

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