faiss::IDSelectorBatch Struct Reference

#include <AuxIndexStructures.h>

Inheritance diagram for faiss::IDSelectorBatch:

Public Types
typedef unsigned char	uint8_t
Public Types inherited from faiss::IDSelector
typedef Index::idx_t	idx_t

Public Member Functions
	IDSelectorBatch (long n, const idx_t *indices)
bool	is_member (idx_t id) const override

Public Attributes
std::unordered_set< idx_t >	set
std::vector< uint8_t >	bloom
int	nbits
idx_t	mask

Detailed Description

Remove ids from a set. Repetitions of ids in the indices set passed to the constructor does not hurt performance. The hash function used for the bloom filter and GCC's implementation of unordered_set are just the least significant bits of the id. This works fine for random ids or ids in sequences but will produce many hash collisions if lsb's are always the same

Definition at line 76 of file AuxIndexStructures.h.

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The documentation for this struct was generated from the following files:

• /data/users/matthijs/github_faiss/faiss/AuxIndexStructures.h
• /data/users/matthijs/github_faiss/faiss/AuxIndexStructures.cpp