table afru is slowly to get data

hello

I want to get data from AFRU table, but It is very slowly, for get every thing

select afpo~aufnr

     from afpo

     into table it_all_ord_pcnf

     where  afpo~matnr in material and

           exists ( select aufnr from VJAUFK where INACT = ' ' and stat = 'I0010'   ).

   select DISTINCT RUECK

     from afru

      into table it_op_de

      for all entries in it_all_ord_pcnf

      where AUERU = 'X'  and aufnr = it_all_ord_pcnf-aufnr.