Answer Posted / v.ramakrishna

when it comes to the matter of performance optimization we
can understand the diff between conn lookup and unconn
lookup y bcoz in conncted lookup it will give more than one
output. when compared with the performance of unconn lookup
it is some what slower bcoz the execution times in conn
lookup is equal with no of records present in source . so
it will increase running time . where as in unconn lookup
it executes only for records which satisfy the given
condition so no need to call lookup for each and every
record unneccesarily. so it leads to performance
development in unconn lookup compared wth conn lookup.

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