Record Groups Vs Plsql table

Hi,
In forms, I am storing some values in a plsql table(like an array). Everytime a value is chosen in the filter, I do a sequential search of the table to retrieve my values. As this is a single table the search is taking a long time.I would like to replace this with multiple run time record groups. My question is whether the storing and retrieval from record groups are in any way faster or slower than retrieval from a table? I dont know the exact row number. So I have to do a sequential read of the record group also. So it will be something like :
for i in 1..10 loop
v := get_group_char_Cell('col name',i);
end loop;
Is this faster than
for i in 1..10 loop
v := tab(i).col;
end loop;
Ps: The record group could be smaller than the table as it will be multiple. Table will be always be one.
Thanks in Advance.

Hi ,
I have a filter which has certain values. When the value is chosen, I need to look thru either the table or record group sequentially to get the matched record and apply it. We want to make this process as fast as possible. Hence the question of using plsql table vs record groups vs GLOBAL table. I was given to understand that if the global table is indexed it could be as fast or faster than the plsql table. The advantage in using GLOBAL table might be that I can directly select the value instead of retrieving the entire PLSQL table and compare the values.
EG -
for i in 1..tab.count loop
tab(i).col = val;
end loop
select col into v from GLOBAL_TAB where col1 = val;
So which you think would be faster? Also consider the record groups.
Thanks in Advance.

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