speed up automaton seeking in nextString
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Key: LUCENE-2672
URL: https://issues.apache.org/jira/browse/LUCENE-2672
Project: Lucene - Java
Issue Type: Improvement
Components: Search
Reporter: Robert Muir
Priority: Minor
Fix For: 4.0
While testing, i found there are some queries (e.g. wildcard ?????????) that do
quite a lot of backtracking.
nextString doesn't handle this particularly well, when it walks the DFA, if it
hits a dead-end and needs to backtrack, it increments the bytes, and starts
over completely.
alternatively it could save the path information in an int[], and backtrack()
could return a position to restart from, instead of just a boolean.
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