Ma Lin <[email protected]> added the comment:
I modify lzma module to use different growth factors, see attached picture
different_factors.png
1.5x should be the growth factor of _PyBytesWriter under Windows.
So if change _PyBytesWriter to use memory blocks, maybe there will be no
performance improvement.
Over allocate factor of _PyBytesWriter:
# ifdef MS_WINDOWS
# define OVERALLOCATE_FACTOR 2
# else
# define OVERALLOCATE_FACTOR 4
# endif
(I'm using Windows 10)
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Added file: https://bugs.python.org/file49544/different_factors.png
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