[Advanced-java] improving performance of recursive algorithm

[mergen@xxxxxxxxxxxx (Sergio Luis Sardi Mergen)]

hello list


 i'm wondering how i can increase the performance of a recursive
algorithm..It takes data from a database and perform some tasks. It
takes quite a while to complete the tasks when dealing with a large
amount of data. The algorithm makes use of: 

 string concatenation
 type casting
 use of hashtable/Vector (necessary)
 use of labels


 does any of these affect the performance?

 Some of the above can be removed (with some pain), like the use of
labels, but i'm afraid i have to use Hashtables and Vectors. But even so
it would be good to know all that can influence the results.


thanks very much for helping


Sergio