Michael McCandless wrote:
One thing I have been wondering is whether it really is necessary to
sort the term vectors before writing to the index....
Terms in vectors are prefix-compressed. So not sorting would make
indexes bigger, and slower to read & write.
http://lucene.apache.org/java/docs/fileformats.html#Term%20Vectors
Also, having them sorted makes it much easier to do dot products between
document vectors, a potentially common operation.
Doug
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