8000 gh-117151: IO performance improvement, increase io.DEFAULT_BUFFER_SIZE to 128k by morotti · Pull Request #118144 · python/cpython · GitHub
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gh-117151: IO performance improvement, increase io.DEFAULT_BUFFER_SIZE to 128k #118144

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Merged
merged 19 commits into from
Mar 7, 2025
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gh-117151: IO performance improvement, increase io.DEFAULT_BUFFER_SIZE to 128k #118144

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pythongh-117151: IO performance improvement, increase io.DEFAULT_BUFF…
rmmancom Feb 5, 2025
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construct the test data more efficiently, no intermediate list
rmmancom Feb 5, 2025
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adjust news and comments
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curly braces
rmmancom Feb 5, 2025
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cap the block size to 8 MB.
rmmancom Feb 5, 2025
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use with to open file
rmmancom Feb 5, 2025
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cap the block size to 8 MB.
rmmancom Feb 5, 2025
8546600
add constant MAXIMUM_BUFFER_SIZE
rmmancom Feb 6, 2025
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update docstring
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expose MAXIMUM_BUFFER_SIZE
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Revert "expose MAXIMUM_BUFFER_SIZE"
rmmancom Feb 7, 2025
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rename to _MAXIMUM_BUFFER_SIZE
rmmancom Feb 7, 2025
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remove constant _MAXIMUM_BUFFER_SIZE
rmmancom Feb 10, 2025
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update news
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Merge branch 'main' into io-buffer-size
morotti Feb 11, 2025
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move to after error
rmmancom Feb 18, 2025
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update news message to match code
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format code block with double backticks
rmmancom Mar 7, 2025
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Merge branch 'main' into io-buffer-size
rmmancom Mar 7, 2025
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format code block with double backticks
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@rmmancom
rmmancom committed Mar 7, 2025
commit f9258be5a25cbd596937ac9b999c2a357f17e209
2 changes: 1 addition & 1 deletion Doc/library/functions.rst
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Expand Up @@ -1406,7 +1406,7 @@ are always available. They are listed here in alphabetical order.
given, the default buffering policy works as follows:

* Binary files are buffered in fixed-size chunks; the size of the buffer
is max(min(blocksize, 8 MiB), DEFAULT_BUFFER_SIZE)
is ``max(min(blocksize, 8 MiB), DEFAULT_BUFFER_SIZE)``
when the device block size is available.
On most systems, the buffer will typically be 128 kilobytes long.

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