OpenNLP on Steroids

This fork of OpenNLP includes simple optimisations that seriously enhance its performance.

• Replace a custom hashtable by the standard Java Hashtable. Increases performance on more or less every training task since this component is central.
• Uses fast exponentiaion for the Maxent model for both training and evaluation, passes all tests, increase performance
• Uses a priorityQueue for the beamsearch instead of the custom heap. Drastically improve evaluation performance.
• Remove the I/O bound issue when using two phase training where the system was previously hindered by writing performance. Writing is now in a separate thread.

Performance gain

Depending on your configuration, tasks and size of your training dataset, you will have a performance gain of at least 10 percent and up to 300 percent on 2 phase training on large datasets.