Re: md5 checksum of a img file, or get the value of 100th byte

[Eli Zaretskii]

> From: Ted Zlatanov <tzz@lifelogs.com>
> Date: Fri, 06 Jun 2008 09:44:57 -0500
> 
> On Thu, 05 Jun 2008 22:17:02 +0300 Eli Zaretskii <eliz@gnu.org> wrote: 
> 
> EZ> Reading the file into a buffer and then working on that buffer is one
> EZ> of the most efficient operations in Emacs.  After all, this is the
> EZ> most basic operation of any text editor, so it must be heavily
> EZ> optimized.
> 
> Not if the file is large :)

Yes, even if the file is large.

Note, I'm talking about Emacs, not about any computer program in
general.

> I'd like to see a 'sliding editing window' for large files but I
> think it would require changes at the C level.

??? insert-file-contents already can read only a portion of a file.
See its doc string.