[issue46864] Deprecate ob_shash in BytesObject
Ma Lin
report at bugs.python.org
Wed Mar 23 07:50:49 EDT 2022
Ma Lin <malincns at 163.com> added the comment:
If put a bytes object into multiple dicts/sets, the hash need to be computed multiple times. This seems a common usage.
bytes is a very basic type, users may use it in various ways. And unskilled users may checking the same bytes object against dicts/sets many times.
FYI, 1 GiB data:
function seconds
hash() 0.40
binascii.crc32() 1.66 (Gregory P. Smith is trying to improve this)
zlib.crc32() 0.65
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<https://bugs.python.org/issue46864>
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