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https://issues.apache.org/jira/browse/LUCENE-5354?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13867698#comment-13867698
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Remi Melisson commented on LUCENE-5354:
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Great, glad to contribute!
In term of performance, I'm using it on my laptop with 30K terms and the mean
time for lookup is 5ms for 5 results and 45ms for 50 results (with a factor 10,
ie. I retrieve 50 / 500 items then reduce to 5 / 50). I'm not following a
proper testing methodology so it's just roughly what I observed.
I will do more extensive testing performance-wise and yeah, we can tackle that
later on.
> Blended score in AnalyzingInfixSuggester
> ----------------------------------------
>
> Key: LUCENE-5354
> URL: https://issues.apache.org/jira/browse/LUCENE-5354
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/spellchecker
> Affects Versions: 4.4
> Reporter: Remi Melisson
> Priority: Minor
> Labels: suggester
> Fix For: 5.0, 4.7
>
> Attachments: LUCENE-5354.patch, LUCENE-5354_2.patch,
> LUCENE-5354_3.patch
>
>
> I'm working on a custom suggester derived from the AnalyzingInfix. I require
> what is called a "blended score" (//TODO ln.399 in AnalyzingInfixSuggester)
> to transform the suggestion weights depending on the position of the searched
> term(s) in the text.
> Right now, I'm using an easy solution :
> If I want 10 suggestions, then I search against the current ordered index for
> the 100 first results and transform the weight :
> bq. a) by using the term position in the text (found with TermVector and
> DocsAndPositionsEnum)
> or
> bq. b) by multiplying the weight by the score of a SpanQuery that I add when
> searching
> and return the updated 10 most weighted suggestions.
> Since we usually don't need to suggest so many things, the bigger search +
> rescoring overhead is not so significant but I agree that this is not the
> most elegant solution.
> We could include this factor (here the position of the term) directly into
> the index.
> So, I can contribute to this if you think it's worth adding it.
> Do you think I should tweak AnalyzingInfixSuggester, subclass it or create a
> dedicated class ?
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