GNU bug report logs - #17607
emacs -nw FILE incurs 2-second wait before displaying anything

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Jim Meyering <jim <at> meyering.net>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>, bug-gnu-emacs <at> gnu.org
Cc: emacs-devel <emacs-devel <at> gnu.org>
Subject: Re: emacs -nw FILE incurs 2-second wait before displaying anything
Date: Mon, 26 May 2014 21:35:32 -0700

On Mon, May 26, 2014 at 8:28 PM, Stefan Monnier
<monnier <at> iro.umontreal.ca> wrote:
>> This problem arises only with OS X's "Terminal" (2.3 (309)), but not
>> with aterm, xterm, or iTerm.  Here's the output of "C-h l":
>
>> ESC [ > 8 3 ; 4 0 0 0 3 ; 0 c C-h l
>
> Hmmm... can you check with the Emacs pretest (24.3.91 or checked out
> from `emacs-24')?  If you still see the problem there, please make it
> a bug report so we can better track it.

I confirm that the 2-second delay still strikes when using a
just-bootstrapped-from-"emacs-24" binary and running
src/emacs -nw -Q FILE.  I see the same output as above for "C-h l".

As mentioned above, it appears to be terminal specific,
striking only when using OS X's "Terminal".
The delay arises before the contents of the FILE is first displayed,
and can be skipped if you know to type a key during that short
interval.  For some initial discussion, see this thread:

  https://lists.gnu.org/archive/html/emacs-devel/2014-05/msg00445.html

Message #10 received at 17607 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Jim Meyering <jim <at> meyering.net>
Cc: 17607 <at> debbugs.gnu.org
Subject: Re: emacs -nw FILE incurs 2-second wait before displaying anything
Date: Thu, 12 Jun 2014 09:35:33 -0400

[ Please don't crosspost messages between emacs-devel and bug-gnu-emacs.
  Or between bug-gnu-emacs and pretty much anything else.  ]

>>> This problem arises only with OS X's "Terminal" (2.3 (309)), but not
>>> with aterm, xterm, or iTerm.  Here's the output of "C-h l":
>>> ESC [ > 8 3 ; 4 0 0 0 3 ; 0 c C-h l
>> Hmmm... can you check with the Emacs pretest (24.3.91 or checked out
>> from `emacs-24')?  If you still see the problem there, please make it
>> a bug report so we can better track it.
> I confirm that the 2-second delay still strikes when using a
> just-bootstrapped-from-"emacs-24" binary and running
> src/emacs -nw -Q FILE.  I see the same output as above for "C-h l".

Does the patch below fix the 2-second wait?


        Stefan


=== modified file 'lisp/term/xterm.el'
--- lisp/term/xterm.el	2014-04-22 20:35:33 +0000
+++ lisp/term/xterm.el	2014-06-12 13:30:56 +0000
@@ -509,6 +509,10 @@
           ;; Gnome terminal 3.6.1 reports 1;3406;0
           ;; Gnome terminal 2.32.1 reports 1;2802;0
           (setq version 200))
+        (when (and (> version 2000) (equal (match-string 1 str) "83"))
+          ;; OSX's Terminal.app (version 2.3 (309), which returns 83;40003;0)
+          ;; seems to also lack support for some of these.
+          (setq version 240))
         ;; If version is 242 or higher, assume the xterm supports
         ;; reporting the background color (TODO: maybe earlier
         ;; versions do too...)

Message #13 received at 17607 <at> debbugs.gnu.org (full text, mbox):

From: Jim Meyering <jim <at> meyering.net>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 17607 <at> debbugs.gnu.org
Subject: Re: emacs -nw FILE incurs 2-second wait before displaying anything
Date: Thu, 12 Jun 2014 17:35:34 -0700

On Thu, Jun 12, 2014 at 6:35 AM, Stefan Monnier
<monnier <at> iro.umontreal.ca> wrote:
...
> Does the patch below fix the 2-second wait?
...

Yes, it does.  Thank you!

Message #18 received at 17607-done <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Jim Meyering <jim <at> meyering.net>
Cc: 17607-done <at> debbugs.gnu.org
Subject: Re: emacs -nw FILE incurs 2-second wait before displaying anything
Date: Fri, 13 Jun 2014 11:07:31 -0400

>> Does the patch below fix the 2-second wait?
> Yes, it does.  Thank you!

Thanks, installed into emacs-24.


        Stefan

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