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5d0d2de955
Add a context manage nlp.memory_zone(), which will begin memory_zone() blocks on the vocab, string store, and potentially other components. Once the memory_zone() block expires, spaCy will free any shared resources that were allocated for the text-processing that occurred within the memory_zone. If you create Doc objects within a memory zone, it's invalid to access them once the memory zone is expired. The purpose of this is that spaCy creates and stores Lexeme objects in the Vocab that can be shared between multiple Doc objects. It also interns strings. Normally, spaCy can't know when all Doc objects using a Lexeme are out-of-scope, so new Lexemes accumulate in the vocab, causing memory pressure. Memory zones solve this problem by telling spaCy "okay none of the documents allocated within this block will be accessed again". This lets spaCy free all new Lexeme objects and other data that were created during the block. The mechanism is general, so memory_zone() context managers can be added to other components that could benefit from them, e.g. pipeline components. I experimented with adding memory zone support to the tokenizer as well, for its cache. However, this seems unnecessarily complicated. It makes more sense to just stick a limit on the cache size. This lets spaCy benefit from the efficiency advantage of the cache better, because we can maintain a (bounded) cache even if only small batches of documents are being processed.
30 lines
843 B
Cython
30 lines
843 B
Cython
from cymem.cymem cimport Pool
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from libc.stdint cimport int64_t, uint32_t
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from libcpp.set cimport set
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from libcpp.vector cimport vector
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from murmurhash.mrmr cimport hash64
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from preshed.maps cimport PreshMap
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from .typedefs cimport attr_t, hash_t
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ctypedef union Utf8Str:
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unsigned char[8] s
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unsigned char* p
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cdef class StringStore:
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cdef Pool mem
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cdef vector[hash_t] _keys
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cdef vector[hash_t] _transient_keys
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cdef PreshMap _map
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cdef PreshMap _transient_map
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cdef Pool _non_temp_mem
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cdef hash_t _intern_str(self, str string, bint transient)
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cdef Utf8Str* _allocate_str_repr(self, const unsigned char* chars, uint32_t length) except *
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cdef str _decode_str_repr(self, const Utf8Str* string)
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cpdef hash_t hash_string(object string) except -1
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cpdef hash_t get_string_id(object string_or_hash) except -1
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