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bug#17648: 24.4.50; regression: emacsclient under screen (1) slow for so

From: Daniel Colascione
Subject: bug#17648: 24.4.50; regression: emacsclient under screen (1) slow for some values of TERM
Date: Sat, 31 May 2014 18:26:25 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0

On 05/31/2014 06:25 PM, Daniel Colascione wrote:
> On 05/31/2014 06:23 PM, Stefan Monnier wrote:
>>> almost instantaneously shows the scratch buffer (or some other
>>> last used buffer), then for 2 secs nothing happens, then the
>>> window shows the buffer which corresponds to some-file-name and
>>> one is able to work with it.
>>> This happens for some values of TERM.
>> Can you describe as precisely as possible the text-terminal you're
>> using, and tell us what C-h l says right after this 2s delay?
>>> I did a git bisect on the repo and this produced:
>> [...]
>>>     2014-04-17  Daniel Colascione  <address@hidden>
>>>         Add support for bracketed paste mode; add infrastructure for
>>>         managing terminal mode enabling and disabling automatically.
>> Dan, it looks like the magic sequence to enable bracketed paste mode
>> will need to use some version checking code :-(
>> Can you take a look at it?
> Sure --- but I'm not sure why the result varies depending on the value
> of TERM. Aren't we sending the same sequence regardless? Jim's recent
> complaint about another two second delay seems related. I feel like the
> terminal-echo recognition must be wrong somehow.

Also, that change also made term/screen.el use term/xterm.el. It's not
the bracketed paste stuff per se that's causing the problem, but the
terminal echo stuff.

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