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https://issues.apache.org/jira/browse/LUCENE-1593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12699314#action_12699314
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Shai Erera commented on LUCENE-1593:
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I thought that when we move to 3.0 we're not expected to support jar
drop-in-ability? Those two methods are already declared final, so no one could
override them. The only problem now is with jar drop-in-ability.
If I'm wrong, and we are suppose to support it, then I can offer new names for
these two and deprecate them:
* toppablePut(), toppableAdjustTop() - least favored of mine, but I write them
here anyway.
* putWithOverflow, adjustTopWithOverflow - the 'withOverflow' is consistent
with insert, but unlike insert, there's no overflow here.
* offer/add (for put) and updateTop.
You can suggest yours too. However I do think that if jar drop-in-ability is
not required in 3.0, we should not change the names and just document the impl
changes in 3.0.
> Optimizations to TopScoreDocCollector and TopFieldCollector
> -----------------------------------------------------------
>
> Key: LUCENE-1593
> URL: https://issues.apache.org/jira/browse/LUCENE-1593
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Search
> Reporter: Shai Erera
> Fix For: 2.9
>
>
> This is a spin-off of LUCENE-1575 and proposes to optimize TSDC and TFC code
> to remove unnecessary checks. The plan is:
> # Ensure that IndexSearcher returns segements in increasing doc Id order,
> instead of numDocs().
> # Change TSDC and TFC's code to not use the doc id as a tie breaker. New docs
> will always have larger ids and therefore cannot compete.
> # Pre-populate HitQueue with sentinel values in TSDC (score = Float.NEG_INF)
> and remove the check if reusableSD == null.
> # Also move to use "changing top" and then call adjustTop(), in case we
> update the queue.
> # some methods in Sort explicitly add SortField.FIELD_DOC as a "tie breaker"
> for the last SortField. But, doing so should not be necessary (since we
> already break ties by docID), and is in fact less efficient (once the above
> optimization is in).
> # Investigate PQ - can we deprecate insert() and have only
> insertWithOverflow()? Add a addDummyObjects method which will populate the
> queue without "arranging" it, just store the objects in the array (this can
> be used to pre-populate sentinel values)?
> I will post a patch as well as some perf measurements as soon as I have them.
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