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gh-152074: Increase the buffer size to 256 KiB in _sendfile_fallback #152097

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gh-152074: Increase the buffer size to 256 KiB in _sendfile_fallback #152097

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47233ca
Use 256 KiB chunksize in _sendfile_fallback
prakashsellathurai Jun 24, 2026
0385f87
📜🤖 Added by blurb_it.
blurb-it[bot] Jun 24, 2026
5926feb
Merge branch 'main' into fix/152074
prakashsellathurai Jun 24, 2026
b286191
typo
prakashsellathurai Jun 24, 2026
ae5c666
Merge branch 'main' into fix/152074
prakashsellathurai Jun 24, 2026
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5 changes: 4 additions & 1 deletion Lib/asyncio/base_events.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1296,7 +1296,10 @@ async def _sendfile_native(self, transp, file, offset, count):
async def _sendfile_fallback(self, transp, file, offset, count):
if hasattr(file, 'seek'):
file.seek(offset)
blocksize = min(count, 16384) if count else 16384
blocksize = (
min(count, constants.SENDFILE_FALLBACK_READBUFFER_SIZE)
if count else constants.SENDFILE_FALLBACK_READBUFFER_SIZE
)
buf = bytearray(blocksize)
total_sent = 0
proto = _SendfileFallbackProtocol(transp)
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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Library/2026-06-24-16-08-44.gh-issue-152074.PsbS-I.rst
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@@ -0,0 +1 @@
Increase the buffer size to 256 KiB in :meth:`asyncio.loop.sendfile` method fallback.
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