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micro opt lz4/zstd decompress: keep memoryview a bit longer, fixes #3412 

if LZ4/ZSTD.decompress gets called with a memoryview idata, keep
it until after the super().decompress(idata) call, so we save one
copy operation just to remove the 2 bytes long compression type
header.
This commit is contained in:
Thomas Waldmann 2022-04-01 20:50:31 +02:00
parent e8456ff7d9
commit df23f3ed22
1 changed files with 2 additions and 2 deletions
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4
src/borg/compress.pyx
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@ -202,9 +202,9 @@ class LZ4(DecidingCompressor):
return NONE_COMPRESSOR, None return NONE_COMPRESSOR, None
def decompress(self, idata): def decompress(self, idata):
idata = super().decompress(idata)
if not isinstance(idata, bytes): if not isinstance(idata, bytes):
idata = bytes(idata) # code below does not work with memoryview idata = bytes(idata) # code below does not work with memoryview
idata = super().decompress(idata)
cdef int isize = len(idata) cdef int isize = len(idata)
cdef int osize cdef int osize
cdef int rsize cdef int rsize
@ -304,9 +304,9 @@ class ZSTD(DecidingCompressor):
return NONE_COMPRESSOR, None return NONE_COMPRESSOR, None
def decompress(self, idata): def decompress(self, idata):
idata = super().decompress(idata)
if not isinstance(idata, bytes): if not isinstance(idata, bytes):
idata = bytes(idata) # code below does not work with memoryview idata = bytes(idata) # code below does not work with memoryview
idata = super().decompress(idata)
cdef int isize = len(idata) cdef int isize = len(idata)
cdef unsigned long long osize cdef unsigned long long osize
cdef unsigned long long rsize cdef unsigned long long rsize