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Use bytearray.take_bytes to speed up asyncio.streams #141863
Description
Feature or enhancement
Proposal:
Multiple codepaths in asyncio.streams operate on self._buffer (a bytearray) and then "take" (copy and delete bytes from original) when returning or passing them to other functions. That code pattern can be optimized with .take_bytes() added in gh-139871
Pyperformance:
tb_base.json
============
Performance version: 1.13.0
Python version: 3.15.0a2+ (64-bit) revision 227b9d326ec
Report on Linux-6.17.8-arch1-1-x86_64-with-glibc2.42
Number of logical CPUs: 32
Start date: 2025-11-22 16:18:13.127794
End date: 2025-11-22 16:18:41.207577
tb_asyncio.json
===============
Performance version: 1.13.0
Python version: 3.15.0a2+ (64-bit) revision 6982581e422
Report on Linux-6.17.8-arch1-1-x86_64-with-glibc2.42
Number of logical CPUs: 32
Start date: 2025-11-22 16:13:46.913998
End date: 2025-11-22 16:14:14.140152
### asyncio_tcp ###
Mean +- std dev: 169 ms +- 2 ms -> 143 ms +- 6 ms: 1.18x faster
Significant (t=18.89)
### asyncio_tcp_ssl ###
Mean +- std dev: 546 ms +- 8 ms -> 533 ms +- 6 ms: 1.02x faster
Significant (t=6.02)
Has this already been discussed elsewhere?
No response given
Links to previous discussion of this feature:
No response
Activity
pythongh-141863: Use bytearray.take_bytes in asyncio.streams
gh-141863: use `bytearray.take_bytes` in asyncio streams for better p…
pythongh-141863: use `bytearray.take_bytes` in asyncio streams for be…
pythongh-141863: use `bytearray.take_bytes` in asyncio streams for be…