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Release 3.3.0

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Carrot2 Project......
Carrot2: open source framework for building search clustering engines
The 3.3.0 release brings significant improvements in the scalability of the STC clustering algorithm, improvements to the Controller API and a number of minor bug fixes.
Significant scalability improvements Release 3.3.0 significantly improves scalability of the content preprocessing chain used by Carrot2 clustering algorithms. This results in almost 7x faster clustering in case of the STC algorithm applied to larger collections of documents. Scalability of the STC clustering algorithm Due to a specific algorithmic nature, the Lingo clustering algorithm received only a modest performance gain.
Controller API improvements With release 3.3.0, the component instance pooling and data caching facilities of the CachingController have been separated. ControllerFactory can now create controllers with any combination of pooling (enabled/disabled) and caching (enabled/disabled). For more details, please see the JavaDoc and the related JIRA issue.
Optional attributes visible by default in Workbench Release 3.3.0 of the Document Clustering Workbench by default shows both required and optional attributes of document sources in the Search View. Optional attributes visible by default in Workbench
Dependency updates A number of dependencies have been updated:

For a complete list of improvements and bug fixes, see JIRA issues fixed in version 3.3.0. For more new features, please see release 3.2.0 and release 3.1.0 notes.

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