[Python-Dev] Inherance of file descriptor and handles on Windows (PEP 446)

[Antoine Pitrou]

Le Fri, 26 Jul 2013 14:08:35 +0200,
Victor Stinner <victor.stinner at gmail.com> a écrit :
> 
> After having written 2 PEP on the topic, I slowly agree that make all
> file descriptors non-inheritable is the best *compromise*. It solves
> most, or all, issues.

Even stdin/stdout/stderr? I think inheriting them is the sane default.

> The main drawback is the additionnal syscalls: on some platforms, 2
> additional syscalls are need to make a file descriptor non-inheritable
> for each creation of file descriptor. According to my benchmark on the
> implementation of the PEP 433: the overhead of making a file
> descriptor non-inheritable is between 1% and 3% (7.8 µs => 7.9 or 8.0
> µs) on Linux 3.6.

1% and 3% of what?
You're telling us there's a 0.1µs overhead. It's positively tiny.

Regards

Antoine.