[Native] SIMD implementations for native `int4` vector scoring#144429

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ldematte merged 40 commits intoelastic:mainfrom

ldematte:native/vec-i4-simd

Mar 18, 2026

Commits on Mar 13, 2026

Removing duplicated classes + single correction function
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Merge remote-tracking branch 'upstream/main' into native/vec-i4
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Merge branch 'native/vec-i4' into native/vec-i4-impl
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Small fix -- explicit cast to long to force <R> to be Long
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Refactoring: extract common ScorerImpl, fix heap-segment, improve segment handling.
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Add tests for bulk scoring, NIO filesystem. Move common function to AbstractVectorTestCase
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Add benchmarks for native; refactor benchmark code to share utilities with test code via testFixture.
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Revert native Int4 scorer integration in codec
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Refactor: expose Int4 test utilities via a test fixture in libs/native
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Introduce lower level i4 distance functions tests
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Small test fix
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Commits on Mar 17, 2026