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Re: emacs takes exhorbitantly long to read long, one-line files.
From: |
Eli Zaretskii |
Subject: |
Re: emacs takes exhorbitantly long to read long, one-line files. |
Date: |
Mon, 20 May 2013 18:59:44 +0300 |
> From: Karl Fogel <address@hidden>
> Date: Mon, 20 May 2013 09:32:23 -0500
> Cc: Dmitry Antipov <address@hidden>
>
> Dmitry Antipov <address@hidden> writes:
> >> I already had that in my init.el. I've also tried creating an empty
> >> file and setting it to fundamental-mode. In both these cases the
> >> behavior is the same.
> >
> >Hm...is it the same with emacs -Q?
> >
> >> I did notice that emacs is faster - but still unusably slow - when
> >> toggle-truncate-lines is true.
> >
> >Try (setq-default cache-long-line-scans t) too.
>
> That should help a lot.
But it won't succeed to make Emacs usable with such files. E.g., try
this:
M->
C-p
and count the seconds it takes to perform the second command.
What Emacs does behind the scenes is go to the beginning of the
previous _physical_ line (which is quite fast in this case), and the
go all the way down the humongously long line, one character at a
time, until it finds the place to put the cursor. Unless we make
radical changes in this algorithm, how can anyone expect reasonable
performance from this?
- emacs takes exhorbitantly long to read long, one-line files., Randy Yates, 2013/05/18
- Re: emacs takes exhorbitantly long to read long, one-line files., Eli Zaretskii, 2013/05/19
- Re: emacs takes exhorbitantly long to read long, one-line files., Dmitry Antipov, 2013/05/20
- Re: emacs takes exhorbitantly long to read long, one-line files., Randy Yates, 2013/05/20
- Re: emacs takes exhorbitantly long to read long, one-line files., Dmitry Antipov, 2013/05/20
- Re: emacs takes exhorbitantly long to read long, one-line files., Karl Fogel, 2013/05/20
- Re: emacs takes exhorbitantly long to read long, one-line files.,
Eli Zaretskii <=
- Re: emacs takes exhorbitantly long to read long, one-line files., Dmitry Antipov, 2013/05/20
- Re: emacs takes exhorbitantly long to read long, one-line files., Eli Zaretskii, 2013/05/20
- Re: emacs takes exhorbitantly long to read long, one-line files., Randy Yates, 2013/05/20
- Re: emacs takes exhorbitantly long to read long, one-line files., Stephen J. Turnbull, 2013/05/20
- Re: emacs takes exhorbitantly long to read long, one-line files., Eli Zaretskii, 2013/05/20
- Re: emacs takes exhorbitantly long to read long, one-line files., Ulrich Mueller, 2013/05/21
- Re: emacs takes exhorbitantly long to read long, one-line files., Dmitry Antipov, 2013/05/21
- Re: emacs takes exhorbitantly long to read long, one-line files., Ulrich Mueller, 2013/05/21
- Re: emacs takes exhorbitantly long to read long, one-line files., Eli Zaretskii, 2013/05/21
- Re: emacs takes exhorbitantly long to read long, one-line files., Eli Zaretskii, 2013/05/21