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feat(obicompactvec): introduce sparse bit matrix with supporting primitives

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Implements a compact, row-major sparse bit matrix backed by memory-mapped components, introducing EliasFano, PersistentFixedIntVec, and PersistentRankSelectBitVec primitives for efficient storage and decoding. Adds a BinaryMatrix trait to unify row-level operations across dense and sparse implementations. Corrects edge-case behaviors for zero-width bit storage and cardinality-0 rows. Delivers reduced on-disk size and faster random row access, with column reads remaining dense-only. Test suites and benchmarks are included but currently marked as ignored.
This commit is contained in:
Eric Coissac
2026-08-16 21:43:09 +02:00
parent 45b19503a1
commit 50f4820cb9
17 changed files with 2024 additions and 2 deletions
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src/Cargo.lock
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@@ -1721,6 +1721,7 @@ checksum = "830b246a0e5f20af87141b25c173cd1b609bd7779a4617d6ec582abaf90870f3"
name = "obicompactvec"
version = "0.1.0"
dependencies = [
"common_traits",
"memmap2",
"ndarray",
"rayon",