Re: Poor Performance w/ Long Files

[Pascal J. Bourguignon]

Tim Visher <tim.visher@gmail.com> writes:

> On Wed, Aug 19, 2009 at 8:09 PM, Pascal J.
> Bourguignon<pjb@informatimago.com> wrote:
>> Tim Visher <tim.visher@gmail.com> writes:
>>
>>> Hello Everyone,
>>>
>>> I work with many large files (+10,000,000 ASCII characters) at work
>>> and I've noticed that Emacs does extremely poorly with those files.  I
>>> have taken to opening them up in something like Notepad++ to look at
>>> them and editing the programs that operate on them in Emacs.  I'd love
>>> to be able to just stick with Emacs.
>>>
>>> Is there something that I just haven't set yet or does Emacs have
>>> trouble with large files?
>>
>> Perhaps you could disable some emacs options that might take time,
>> like font-locking.  Basically, if you edit this files in fundamental-mode,
>> with truncate-line turned off with C-u 1 M-x toggle-truncate-lines RET and
>> with font-locking turned off with C-u -1 M-x font-lock-mode RET,
>> it should go faster.
>
> This fixed things.  I hadn't even thought of it but the file I was
> opening tried to open in tcl and pabbrev modes and that's what seems
> to have caused the slowdown.  Putting thing back into Fundamental with
> pabbrev off quickened things right up.
>
> Is there a way to manually force a file to open in a particular mode
> without setting an auto-mode in .emacs?

M-x find-file-literally RET

It's written right down at the bottom of the help page for find-file ;-)

    To visit a file without any kind of conversion and without
    automatically choosing a major mode, use M-x find-file-literally.



-- 
__Pascal Bourguignon__