Since the changes, proposed and made by Aviran to FieldInfos class made Lucene java 1 incompatible, but can give us some reasonable performance gain, shouldn't we go ahead with the whole Hashtable -> HashMap and Vector -> ArrayList replacement arround the code to have even more performance in other places?
This cannot be done blindly. Thread safety needs to be carefully considered in each case. For example, if, when used by an IndexReader, the Hashtable or Vector is only modified under a constructor, and treated as read-only subsequently, then it is probably safe to make this conversion. But if it is modified while searching, then access must be synchronized. IndexWriter is less-frequently used in a multi-threaded manner, but is also written to be thread-safe, so uses in IndexWriter need to be closely examined too. And so on.
Doug
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