Re: grep -i excessively slow

[Bob Proulx]

Paul Rubin wrote:
> Now I do the same thing with grep -i, and it takes 200 times longer:
> 
>     address@hidden time grep -i hello myfile >/dev/null
> 
>     real    0m23.437s
>     user    0m22.133s
>     sys     0m0.162s
> 
> This makes me think that grep is doing something really dumb when -i
> is used.

You are almost certainly using a non-standard locale setting.  Try
your case again using a standard locale and I am sure things will be
faster.  The performance difference with non-standard locales is well
known.

  LC_ALL=C time grep -i hello myfile >/dev/null

Bob