[Python-Dev] [Python-checkins] cpython: Switch subprocess stdin to a socketpair, attempting to fix issue #19293 (AIX (original) (raw)

Antoine Pitrou solipsis at pitrou.net
Wed Oct 23 14:08:31 CEST 2013

Le Wed, 23 Oct 2013 13:53:40 +0200, Victor Stinner <victor.stinner at gmail.com> a écrit :

"For the record, pipe I/O seems a little faster than socket I/O under Linux"

In and old (2006) email on LKML (Linux kernel), I read: "as far as I know pipe() is now much faster than socketpair(), because pipe() uses the zero-copy mechanism." https://lkml.org/lkml/2006/9/24/121 On Linux, splice() can also be used with pipes for zero-copy operations. I don't know if splice() works with socketpair().

splice() only works with pipes. socketpair() returns sockets, which are not pipes :-)

Well, I don't think that Python uses splice() now, but it may be interesting to use it.

Where do you want to use it?

Regards

Antoine.

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