GNU bug report logs - #44983
Truncate long lines of grep output

Previous Next

Full log

View this message in rfc822 format

From: Andreas Schwab <schwab <at> linux-m68k.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: juri <at> linkov.net, 44983 <at> debbugs.gnu.org, Dmitry Gutov <dgutov <at> yandex.ru>
Subject: bug#44983: Truncate long lines of grep output
Date: Tue, 01 Dec 2020 17:46:33 +0100

On Dez 01 2020, Eli Zaretskii wrote:

>> From: Dmitry Gutov <dgutov <at> yandex.ru>
>> Date: Tue, 1 Dec 2020 17:02:09 +0200
>> 
>> >>> This is a bug problem - often grep output lines are so long
>> >>> that Emacs freezes, so need to kill the process.  Updating
>> >>> manually ignored-files every time a new file causes freeze
>> >>> is very unreliable and time-consuming workaround.
>> >>
>> >> And a non-obvious one (for an average user).
>> >>
>> >> Is the same problem exhibited by commands using the Xref UI? I don't
>> >> remember seeing it, but of course our projects can be very different.
>> > 
>> > No difference from grep, Xref output has the same problem.
>> 
>> Perhaps (setq truncate-lines t) could help in that case?
>
> Not necessarily, because the truncated parts are still in the buffer,
> and the display code which is slow in that case basically moves
> through the buffer one character at a time in many cases.  Only some
> specific scenarios (read: a small number of commands) can jump to the
> next physical line disregarding the truncated parts.

But moving though the buffer is much faster than rendering it.

Andreas.

-- 
Andreas Schwab, schwab <at> linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.