Re: Passing variables by reference conflicts with local

[Eric Blake]

On 05/04/2010 09:35 AM, Marc Herbert wrote:
> Are you are worried about the *cost* of the subshell? How can
> interactive completion be performance-sensitive?

Anything repetitive, done often enough, is observable even in an
interactive environment.  The bash-completion library of functions does
a _lot_ of repetitive work, and we're talking about some of the core
functions used within that library, possibly even hundreds of times over
the course of a single tab-completion event.  Minimizing subshells has
noticeable impact, particularly on systems like cygwin where fork() is
very slow (no more than 1000 times per second).

-- 
Eric Blake   eblake@redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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