Use OpenBitSet instead of BitVector in SegmentReader
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Key: LUCENE-1485
URL: https://issues.apache.org/jira/browse/LUCENE-1485
Project: Lucene - Java
Issue Type: Improvement
Components: Index
Affects Versions: 2.4
Reporter: Jason Rutherglen
Priority: Minor
Tried out BitVector.get vs OpenBitSet.get here's the results which are about
the same after running 25 times in milliseconds. It is assumed that
implementing DocIdSetIterator for in SegmentTermDocs will speed things up more.
bit set size: 10,485,760
set bits count: 524,032
openbitset: 68
bitvector: 89
24% speed increase.
I will implement a patch that adds the WriteableBitSet interface and make a
subclass of OpenBitSet that is writeable to disk. We're working on an isSparse
method for OpenBitSet.
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