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#16865 PR: Improve size caching in SegmentCommitInfo
54.5 minutes ago  7 comments  0 votes  0 watches  chrisberkhout, github-actions[bot], nicktindall, uschindler
Description SegmentCommitInfosizeInBytes reads the volatile cache to determine if a computation ... If someone calls generationAdvanced while this is going on we have a TOCTOU race. The race can result in 1.
    nicktindall 2.5 hours ago:  Thanks both. I've pushed a version that uses an AtomicLong with compare-and-set, as @uschindler suggested, and ... The problem with compareAndSet(-1, size) is that it can't tell the -1 it read before computing ...
    nicktindall 3.4 days ago:  I'm assuming we don't want to add object creation (an id, cachedSize tuple) or locking here? Either of those approaches would solve all the races I think.

#16903: HNSW merges with asymmetric quantization read the query-side records at random during diversity ...
5.8 hours ago  0 comments  0 votes  0 watches  goankur
Description With an asymmetric encoding such as SINGLE_BIT_QUERY_NIBBLE, a merge writes a ... The graph merge scores with AsymmetricQuantizedRandomVectorScorerSupplier, whose setScoringOrdinal( ... The read for the node being inserted is fine: it happens once per node, in order (HnswGraphBuilder, ...

#15630 PR: Added support for writing empty full-precision vector files
7 hours ago  6 comments  0 votes  0 watches  Pulkitg64, benwtrent, github-actions[bot], mikemccand
Description Issue: 13158 With the help of claude code, I have tried to add support for ... This is the first step of adding read-only index support. Once empty raw vector-data files are generated along with full-precision files, the user can choose ...
    github-actions[bot] 7 hours ago:  This PR has not had activity in the past 2 weeks, labeling it as stale. If the PR is waiting for review, notify the dev@lucene.apache.org list. Thank you for your contribution!
    Pulkitg64 16.7 days ago:  Oh no. I think I accidentally deleted this branch when I was doing cleanup of my forked Lucene. I have restored the branch now.

#16051 PR: Add ArrayTermInSetQuery to sandbox/ along with a JMH benchmark
7 hours ago  6 comments  0 votes  0 watches  GovindBalaji-S-Glean, github-actions[bot], gsmiller, mikemccand, msokolov, uschindler
Description PR for Lucene dev@ thread: https://lists.apache.org/thread/ct04woc11hh9vclhscz8pkdoz ... Trades some RAM for cheaper per-segment iteration and a vectorized equals/hashCode fast path on the ... Includes a JMH benchmark in benchmark-jmh
    github-actions[bot] 7 hours ago:  This PR has not had activity in the past 2 weeks, labeling it as stale. If the PR is waiting for review, notify the dev@lucene.apache.org list. Thank you for your contribution!
    GovindBalaji-S-Glean 14.9 days ago:  > Hmm is this because PrefixCodedTerms cannot skip (seekCeil, seekFloor, etc.)? So it's a linear scan of all terms in the query, for each segment? Yes, the decoding work being done for every term in the query for each segment is pretty expensive ...

#16723 PR: Support SIMD Faiss library variants with runtime fallback (#15287)
7 hours ago  53 comments  0 votes  0 watches  CH-Abhinav, github-actions[bot], kaivalnp, mikemccand
Description Addresses enhancement proposal 1 from 15287: allow Faiss codec to use SIMD ... Previously, FaissLibrary.java and FaissNativeWrapper.java hardcoded System.loadLibrary("faiss_c"). In Conda/PyTorch, libfaiss_c.so dynamically links against the generic, non-vectorized libfaiss.so ...
    CH-Abhinav 10.9 hours ago:  Wow I just reverted this Idk why it changed. Unintended change.
    kaivalnp 11.3 hours ago:  LGTM, thanks @CH-Abhinav

#16748 PR: Rank late interaction SUM_MAX_SIM by raw MaxSim
7 hours ago  1 comments  0 votes  0 watches  LantaoJin, github-actions[bot]
Description **This PR fixes a low impact correctness issue**: SUM_MAX_SIM summed VectorSimilarityF ... The scaling is affine for COSINE and DOT_PRODUCT but not for EUCLIDEAN (1 / (1 + d^2)) or ... Here is a counter-example: query (1,0,0), (0,1,0); doc A (1,0,0); doc B (0.55, 0.55, 0.6285).
    github-actions[bot] 7 hours ago:  This PR has not had activity in the past 2 weeks, labeling it as stale. If the PR is waiting for review, notify the dev@lucene.apache.org list. Thank you for your contribution!

#16799 PR: Bulk score 4-bit Lucene104 vectors with a single native call
7 hours ago  1 comments  0 votes  0 watches  github-actions[bot], slow-J
I was experimenting with native bulk scoring and I saw some good results in benchmarks with this ... I am routing the scorer through VectorizationProvider so the native provider can score a batch of ... The C code scores four vectors per load of the query, with NEON dot product instructions on aarch64 ...
    github-actions[bot] 7 hours ago:  This PR has not had activity in the past 2 weeks, labeling it as stale. If the PR is waiting for review, notify the dev@lucene.apache.org list. Thank you for your contribution!

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