Re: index files to speed up grep

[Jim Meyering]

Peng Yu wrote:
> I'm wondering if there is any development to index files, so that grep
> can search again the index instead of the original files for speed up.
>
> The manual doesn't seem to describe anything on indexing. I don't see
> any useful results by a google search. Could anything body let me know
> if this indexing feature is supported?

If you want to use index files, you may want to look for
a different program (generating such files is typically expensive,
and keeping them up to date is not trivial).  I doubt that grep
will ever create or use separate index files.