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#15737 PR: Store pre-aggregated sum and value count in DocValuesSkipper
32 minutes ago  1 comments  0 votes  0 watches  github-actions[bot], jainankitk, mccullocht, navneet1v
Description This PR extends the DocValues skip index to store pre-aggregated sum and valueCount ... This enables collectors and faceting operations to leverage pre-computed aggregation data at search ...
    navneet1v 32 minutes ago:  @jainankitk will adding these new things in the docvaluesSkipper add an extra burden on the ...

#15752 PR: Add FieldMinMax unified API for global numeric min/max retrieval
35.4 minutes ago  1 comments  0 votes  0 watches  SYEDMDSAAD, github-actions[bot], navneet1v
This patch introduces FieldMinMax, a unified API to retrieve global minimum and maximum numeric ... Currently Lucene exposes two different mechanisms: * PointValues.getMinPackedValue / ... FieldMinMax abstracts over both implementations and provides consistent behavior: * Uses ...
    navneet1v 35.4 minutes ago:  @SYEDMDSAAD trying to understand the motivation behind this API in Lucene specifically? Why this cannot be added in your application side?

#15742 PR: Optimize int4 vector computations by avoiding conversions
37.6 minutes ago  9 comments  0 votes  0 watches  github-actions[bot], kaivalnp, mccullocht
Spinoff from 15736, where @mccullocht identified vector conversions as a potentially slow area ( ... This PR loads and operates on SIMD registers of the preferred bit size to avoid intermediate ... This was sparked from 15697 where we observed a performance drop in JMH benchmarks of some 4-bit ...
    kaivalnp 37.7 minutes ago:  Thanks @mccullocht could you help with a sanity-check JMH benchmark and knnPerfTest run on your x86 ...
    kaivalnp 40.3 minutes ago:  I ran this JMH benchmark on branch_10x with Java 24: `sh java --module-path lucene/ ... *Vector" -p size=1024 ` ` openjdk 24.0.2 2025-07-15 OpenJDK Runtime Environment (build 24.0.2 ...

#15504: Search old graphs during HNSW merging new graph building
2.7 hours ago  2 comments  0 votes  0 watches  Vikasht34, benwtrent, jilldoty-elastic
Description When merging HNSW indexed segments, we attempt to improve the incremental nature of ... This includes: - Utilizing the biggest graph (after repairing deletes) - Optimizing the entry ... I think another good optimization would be to reuse the previously calculated graphs to further ...
    Vikasht34 2.7 hours ago:  @benwtrent Thanks for Sharing this!!
    benwtrent 2.7 hours ago:  New paper just dropped, seems like it could really help with merging! https://arxiv.org/pdf/2602.17099

#12440: Make HNSW merges faster
2.7 hours ago  19 comments  0 votes  0 watches  benwtrent, hpvd, jbellis, jmazanec15, mbrette, tteofili, zhaih
Description It is well known that when merging segments, HNSW is not merged in linear time. We lose a fair bit of useful information as all the NSWs are effectively thrown away (except for a ... This means we have useful distributed work from each segment that is ignored.
    benwtrent 2.7 hours ago:  New paper just dropped, seems like it could really help with merging! https://arxiv.org/pdf/2602.17099
    benwtrent 3.3 months ago:  Stumbled on this code and paper from a publicly linked issue: https://github.com/aponom84/ ... Lots of possibilities for fun experimenting! Just too little time for them all :)

#15292: Expose the name or an indication of which VectorizationProvider is being used
3 hours ago  8 comments  0 votes  0 watches  dweiss, hossman, risdenk, tflobbe, uschindler
Description Given an application that could benefit from using PanamaVectorizationProvider, I ... Right now, this doesn't seem possible without using some kind of reflection and hacks on the ... I was thinking we could have a public static String getImplementationName() or something that's ...
    dweiss 3 hours ago:  I agree, Uwe and I did implement this kind of fallback-type service loader in a branch (as part of ... I wasn't too happy with it though and abandoned it.
    hossman 3 hours ago:  > One issue I see with is that, if tomorrow we have more than one "optimized version" we wouldn't ... It really all depends on how you want to define/document the isOptimized() method -- we could say ... IIUC That's basically what happens today with PanamaVectorUtilSupport: you could argue that (from a ...

#15520: Should Lucene offer a helper class for primary key lookups?
3.1 hours ago  4 comments  0 votes  0 watches  Vikasht34, gsmiller, mikemccand, risdenk, shubhamsrkdev
Primary key lookup is such a common use case for search engines -- Lucene's nightly benchmarks ... It's a stress test of Lucene's terms index/dictionary impl, and it has been surprisingly volatile ... This task (PKLookupTask) is somewhat bespoke: it first (on init -- not counted in the benchy ...
    Vikasht34 3.1 hours ago:  @shubhamsrkdev Go for it.
    shubhamsrkdev 3.2 hours ago:  @Vikasht34 I did some enhancements to the PKLookupTask as discussed here. I haven't published/tested the PR yet, will abandon in case you're working on it. Thanks!

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