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https://github.com/explosion/spaCy.git
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1b8d560d0e
Add a context manage nlp.memory_zone(), which will begin
memory_zone() blocks on the vocab, string store, and potentially
other components.
Example usage:
```
with nlp.memory_zone():
for text in nlp.pipe(texts):
do_something(doc)
# do_something(doc) <-- Invalid
```
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.
50 lines
1.4 KiB
Cython
50 lines
1.4 KiB
Cython
from cymem.cymem cimport Pool
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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 .morphology cimport Morphology
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from .strings cimport StringStore
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from .structs cimport LexemeC, TokenC
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from .typedefs cimport attr_t, hash_t
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cdef LexemeC EMPTY_LEXEME
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cdef union LexemesOrTokens:
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const LexemeC* const* lexemes
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const TokenC* tokens
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cdef struct _Cached:
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LexemesOrTokens data
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bint is_lex
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int length
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cdef class Vocab:
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cdef Pool mem
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cdef readonly StringStore strings
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cdef public Morphology morphology
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cdef public object _vectors
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cdef public object _lookups
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cdef public object writing_system
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cdef public object get_noun_chunks
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cdef readonly int length
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cdef public object _unused_object # TODO remove in v4, see #9150
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cdef public object lex_attr_getters
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cdef public object cfg
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cdef const LexemeC* get(self, Pool mem, str string) except NULL
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cdef const LexemeC* get_by_orth(self, Pool mem, attr_t orth) except NULL
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cdef const TokenC* make_fused_token(self, substrings) except NULL
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cdef const LexemeC* _new_lexeme(self, Pool mem, str string) except NULL
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cdef int _add_lex_to_vocab(self, hash_t key, const LexemeC* lex, bint is_transient) except -1
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cdef const LexemeC* _new_lexeme(self, Pool mem, str string) except NULL
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cdef PreshMap _by_orth
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cdef Pool _non_temp_mem
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cdef vector[attr_t] _transient_orths
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