Robert Muir created LUCENE-4540:
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Summary: Allow packed ints norms
Key: LUCENE-4540
URL: https://issues.apache.org/jira/browse/LUCENE-4540
Project: Lucene - Core
Issue Type: Task
Components: core/index
Reporter: Robert Muir
Attachments: LUCENE-4540.patch
I was curious what the performance would be, because it might be useful option
to use packedints for norms if you have lots of fields and still want good
scoring:
Today the smallest norm per-field-per-doc you can use is a single byte, and if
you have _f_ fields with norms enabled and _n_ docs, it uses _f_ * _n_ bytes of
space in RAM.
Especially if you aren't using index-time boosting (or even if you are, but not
with ridiculous values), this could be wasting a ton of RAM.
But then I noticed there was no clean way to allow you to do this in your
Similarity: its a trivial patch.
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