Han Jiang created LUCENE-5028:
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Summary: doShare is in PositiveIntOutputs
Key: LUCENE-5028
URL: https://issues.apache.org/jira/browse/LUCENE-5028
Project: Lucene - Core
Issue Type: Improvement
Components: core/FSTs
Reporter: Han Jiang
Assignee: Han Jiang
Priority: Minor
Fix For: 5.0
We recently use this in oal.core.fst.PositiveIntOutputs to indicate whether to
share outputs. The comment mentioned 'with doShare=false, in some case this may
result in a smaller FST'. However, this is not intuitive, as for long type, we
always have the smallest output reduced to NO_OUTPUT, thus the smallest one is
'moved' towards root, and no extra output is created.
However, if there are many many small outputs around root arcs, when we share
outputs, a large output might be pushed into the root arcs. When root arcs are
packed as fixed-array, yes the size of FST is increased. But, I suppose this
should invoke other intuitive heuristics, instead of the confusing 'doShare'?
Besides, this only exist in PositiveIntOutputs.
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