How long time create a index ?

It depends how big is the table and what Index type it is.
for non FTS index, it is usually not too long. Only if you have a VERY big table with tens of millions of records, it may take more than a minute. Huge tables, might take more, maybe 5 or even 10 minutes. But I mean HUGE tables.

P.S.
Did you submit your board to Boardtracker for inclusion? :)

Himmmm OK

Our post is 2.300.000 :) And finished 7 minutes my dual opteron machines ;) ,also now very fast search IP adress and without any problem.

Normaly our boards use a big-boards.com,but manytimes they are not updates our data,for example alexa rating.But I'll invest'gation your service ;)

Thanks