[issue21790] Change blocksize in http.client to the value of resource.getpagesize

[STINNER Victor]

STINNER Victor added the comment:

> When sending data, the blocksize is currently hardcoded to 8192.

Yeah, same value for io.DEFAULT_BUFFER_SIZE.

> It should likely be set to the value of resource.getpagesize().

Could you please elaborate? A page size is 4096 bytes on my Linux. So your page double the number of calls to read(), right?

shutil.copyfileobj() uses a buffer of 16 KB by default.

See also the issue #21679 which adds a private copy of the stat().st_blksize attribute in a FileIO object.

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nosy: +haypo

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<http://bugs.python.org/issue21790>
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