问在oracle中，sql比plsql快吗？

EN

declare 
l_start integer;
l_end integer;
begin
l_start := dbms_utility.get_time;
merge into test111 t1
using test112 t2
on (t1.col1 = t2.col3)
when matched then update 
set t1.col2 = t1.col2*5;
l_end := dbms_utility.get_time;
dbms_output.put_line(l_end - l_start);
end;

declare
type nt_test is table of test112.col3%TYPE;
nt_val nt_test := nt_test();
cursor c is select col3 from test112;
c_limit integer := 100;
l_start integer;
l_end integer;
begin
l_start := DBMS_UTILITY.get_time;
open c;
loop

fetch c 
bulk collect into nt_val limit c_limit;
exit when nt_val.count = 0;

forall i in indices of nt_val
update test111 set col2 = col2/ 5
where col1 = nt_val(i);
commit;

end loop;
l_end := dbms_utility.get_time;
dbms_output.put_line(l_end - l_start);
end;