Added PQ quantizer in Turbo#554
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…efactor/turbo_preprocessor
…rocessor # Conflicts: # .gitignore
…o refactor/turbo_pq
…n237/zvec into refactor/turbo_pq
…nto refactor/turbo_pq
zzlin237
requested review from
chinaux,
egolearner,
feihongxu0824,
iaojnh,
richyreachy and
zhourrr
as code owners
# Conflicts: # src/core/algorithm/diskann/diskann_visit_filter.h
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Performance Analysis:
[Cohere] zvec: 65.16 <----> faiss: 66.80
[GIST] zvec: 54.05 <----> faiss: 53.97
Refiner Performance:
[Cohere] 65.16 ----> 78.32
[GIST] 54.05 ----> 67.80
The basic functionality of PQ has been implemented, and OPQ will be introduced next. Overall, the current PQ scheme is evaluated primarily from a recall perspective, and we expect to further improve recall through OPQ in the future.