MappingCharFilter could be improved by switching to an FST.
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Key: LUCENE-3830
URL: https://issues.apache.org/jira/browse/LUCENE-3830
Project: Lucene - Java
Issue Type: Improvement
Reporter: Dawid Weiss
Assignee: Dawid Weiss
Priority: Minor
Fix For: 4.0
MappingCharFilter stores an overly complex tree-like structure for matching
input patterns. The input is a union of fixed strings mapped to a set of fixed
strings; an fst matcher would be ideal here and provide both memory and speed
improvement I bet.
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