Re: dired and ls

[Lars Ingebrigtsen]

Eli Zaretskii <address@hidden> writes:

>> If we instead had `directory-files-with-attributes' in C, we could just
>> do what "ls" does, which is...  opening the directory, reading it, and
>> then statting all the files.
>
> ls-lisp already uses directory-files-with-attributes.

Aha.  I didn't know about `directory-files-and-attributes'.  And it,
indeed, just reads the directory and then stats all the files...

>> So it should be just as fast?  I think?
>
> You should measure it, instead of trying to reason about that.  IME,
> reasoning about relative timings of programs is never a good idea,
> because measurements always produce surprising results.

Sure.  But it helps talking about stuff before starting to do the real
work...

-- 
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   bloggy blog: http://lars.ingebrigtsen.no