TurboQuant 4-bit Optimization & Index Selection - Task Status

✅ All Tasks Complete

  • [x] Implement 4-bit nibble packing in turboquant.rs

  • [x] Add DistL2u4 distance metric in distance.rs

  • [x] Update hnsw_ivf.rs to use DistL2u4 for TQ4

  • [x] Refine index selection priority in reader.rs

  • [x] Implement Bloom Filter Cache (BLOOM_FILTER_CACHE in cache.rs)

  • [x] Update HybridReader::check_bloom_filter to use the cache

  • [x] Add verification tests for Bloom caching (tests/test_bloom_cache.rs)

  • [x] Integrate RRF scoring

  • [x] General Bloom Filter pruning on read path (tests/test_bloom_pruning.rs)

  • [x] PK acceleration scale test (tests/test_pk_acceleration.rs — 5 segments × 10k)

  • [x] Fix test compiler warnings (unused imports in test_bloom_cache.rs)

Test Results

Test

Result

test_bloom_filter_caching

✅ PASS

test_bloom_filter_general_query_pruning

✅ PASS

test_pk_acceleration_multi_segment

✅ PASS

cargo test --lib (347 tests)

✅ PASS

test_core_ingestion

✅ PASS

test_primary_key (3 tests)

✅ PASS

test_index_lifecycle

✅ PASS

cargo check --tests

✅ No warnings

Status: ✅ COMPLETE Last Updated: April 14, 2026