[Ubuntu] Does the "find" command cache file system info?

[Liam Proven]

On 16 September 2012 00:16, John Hupp <ubuntu at prpcompany.com> wrote:
> I'm curious about this observation: If I do a find search on the root
> directory, it ordinarily takes a minute or two -- as one would expect if it
> were examining everything afresh.
>
> But if I follow that up with a different find search on the root, it
> finishes in a few seconds.
>
> Does find cache file system information and reuse it under certain
> conditions?  Or does Linux itself cache some sort of information from an
> initial search that a subsequent search benefits from?

This is precisely what a disk cache is *for*. It is the purpose of its
existence. It caches the indices of, well, pretty much all the
directories of your disk, so next time, the search is purely in
memory.

-- 
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