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Date: Tue, 06 Jan 2015 19:06:00 -0000
From: Eli Zaretskii <eliz@gnu.org>
Subject: Re: [PATCH] Speed up "gdb -tui" output
In-reply-to: <CADPb22Q7oD3K-dYkngEPDBbV++mLCKifTEmvJczQ=0h2FX0yXA@mail.gmail.com>
To: Doug Evans <dje@google.com>
Cc: gdb-patches@sourceware.org
Reply-to: Eli Zaretskii <eliz@gnu.org>
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References: <83zj9v7urq.fsf@gnu.org> <CADPb22Q7oD3K-dYkngEPDBbV++mLCKifTEmvJczQ=0h2FX0yXA@mail.gmail.com>
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> Date: Tue, 6 Jan 2015 10:37:13 -0800
> From: Doug Evans <dje@google.com>
> Cc: gdb-patches <gdb-patches@sourceware.org>
> 
> bash$ gdb -tui
> (gdb) file foo<ret>
> 
> At this point I've hit return but I don't see anything printed.
> 
> pause pause pause
> 
> and then finally I see all the output:
> 
> Reading symbols from foo...done.
> mumble ...
> (gdb)

If this is the only place where this matters, we could break that line
in two:

  Reading symbols from foo...
  Done reading symbols from foo.

Or maybe we could also call wrefresh when we see 3 consecutive dots,
assuming that these are the cases where a prolonged operation is under
way.

> Another possibility would be to do the string -> char -> string
> processing differently.  String printing utilities could accumulate
> what they want to print and send the output in chunks instead
> of characters.
> Then tui_puts could get real strings instead of always getting
> { char, '\0' }, and maybe that would be enough.

This will hit the same problem: how to know when to stop accumulating
and flush it out.