hi "hun"...would it be slower or faster if i write it this way?

1 select A.x, B.y
2 from xyz A, abc B
3 where trim(A.x) =
4 trim(substr(B.y, instr(B.y,',')+1,
5 length(B.y)) || ' ' ||
6* substr(B.y,1, instr(B.y,',')-1))
SQL> /