grep is horribly slow

[Rafal Dabrowa]

Grep appears to be horribly slow. See:

    $ yes | head -5000 >file
    $ ls -l file
    -rw-r--r-- 1 rafal rafal 10000 2007-10-04 22:02 file
    $ time grep y file >out

    real        0m2.378s
    user        0m2.376s
    sys 0m0.004s
    $ time sed -n '/y/p' file >out

    real        0m0.008s
    user        0m0.008s
    sys 0m0.000s
    $ grep --version
    GNU grep 2.5.3

Over 2 seconds for scanning a ~10 kB file ?


--
Rafal