[arch-general] [arch-dev-public] [signoff] grep-2.6-1

[Xavier Chantry]

On Thu, Mar 25, 2010 at 11:02 AM, Allan McRae <allan at archlinux.org> wrote:
> Upstream big update.
>
> Local changelog:
>  - Removed the multibyte locale speed-up patch (and all the patches to fix
> the issues it created...) as it is now included upstream.
>  - Removed the other patches as it appears they are not being considered
> upstream.
>
> Upstream NEWS:
> * Noteworthy changes in release 2.6 (2010-03-23) [stable]
>
> ** Speed improvements
>
>  grep is much faster on multibyte character sets, especially (but not
>  limited to) UTF-8 character sets.  The speed improvement is also very
>  pronounced with case-insensitive matches.
>

That's awesome. After all these years, I thought this would never happen :)

I did a quick benchmark before and after, and I got very similar
results, so we are good.

grep -i is still considerably slower than grep in UTF-8 (0.1 -> 1.5s ,
that is 15x slower), but IIRC it was MUCH worse with an unpatched grep
2.5, like hundred of times slower.
With LANG=C , grep and grep -i are both at 0.1s.