Eryk Sun <[email protected]> added the comment:
> Buffering is necessary for implementing the universal_newlines
Why is that? I can see that it requires newline state tracking, and the
allowance to make two read(fd, &c, 1) system calls for a single read(1) method
call, in case a "\n" has to be ignored.
testproc-unbuffered.py runs to completion in 3.11 if the following statement
that changes the text wrapper's chunk size is added right after creating the
Popen() instance:
if sys.version_info[0] > 2:
process.stdout._CHUNK_SIZE = 1
The initial chunk size for a text wrapper is hard coded as 8192 bytes. For some
reason the constructor has no parameter for it.
----------
nosy: +eryksun
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<https://bugs.python.org/issue41222>
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