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

[Antoine Pitrou]

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.