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Posted to issues@lucene.apache.org by "Anand Kotriwal (Jira)" <ji...@apache.org> on 2021/01/18 08:48:00 UTC

[jira] [Created] (LUCENE-9674) Faster advance on Vector Values

Anand Kotriwal created LUCENE-9674:
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             Summary: Faster advance on Vector Values
                 Key: LUCENE-9674
                 URL: https://issues.apache.org/jira/browse/LUCENE-9674
             Project: Lucene - Core
          Issue Type: Improvement
          Components: core/codecs
    Affects Versions: master (9.0)
         Environment:  
            Reporter: Anand Kotriwal


The advance() function in the class Lucene90VectorReader does a linear search for the target document.
To make it faster we can do a  binary search over the "ordToDoc" array which will make the advance operation take logarithmic time to search.This will make retrieving vectors for a sparse set of documents efficient.



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