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buzhash/buzhash64: initialise all-zero memory more efficiently

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Thomas Waldmann 2025-11-20 01:35:03 +01:00
parent 631ef99e3f
commit 870f414690
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GPG key ID: 243ACFA951F78E01
2 changed files with 6 additions and 6 deletions
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6
src/borg/chunkers/buzhash.pyx
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@ -7,7 +7,7 @@ import time
from cpython.bytes cimport PyBytes_AsString
from libc.stdint cimport uint8_t, uint32_t
from libc.stdlib cimport malloc, free
from libc.string cimport memcpy, memmove
from libc.string cimport memcpy, memmove, memset
from ..constants import CH_DATA, CH_ALLOC, CH_HOLE, zeros
from .reader import FileReader, Chunk
@ -199,8 +199,8 @@ cdef class Chunker:
# Copy data from chunk to our buffer
memcpy(self.data + self.position + self.remaining, <const unsigned char*>PyBytes_AsString(chunk.data), n)
else:
# For holes, fill with zeros
memcpy(self.data + self.position + self.remaining, <const unsigned char*>PyBytes_AsString(zeros[:n]), n)
# For holes, fill with zeros using memset
memset(self.data + self.position + self.remaining, 0, n)
self.remaining += n
self.bytes_read += n

6
src/borg/chunkers/buzhash64.pyx
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@ -8,7 +8,7 @@ import time
from cpython.bytes cimport PyBytes_AsString
from libc.stdint cimport uint8_t, uint64_t
from libc.stdlib cimport malloc, free
from libc.string cimport memcpy, memmove
from libc.string cimport memcpy, memmove, memset
from ..crypto.low_level import CSPRNG
@ -176,8 +176,8 @@ cdef class ChunkerBuzHash64:
# Copy data from chunk to our buffer
memcpy(self.data + self.position + self.remaining, <const unsigned char*>PyBytes_AsString(chunk.data), n)
else:
# For holes, fill with zeros
memcpy(self.data + self.position + self.remaining, <const unsigned char*>PyBytes_AsString(zeros[:n]), n)
# For holes, fill with zeros using memset
memset(self.data + self.position + self.remaining, 0, n)
self.remaining += n
self.bytes_read += n