Re: RFC: changing the "+" in ls -l output to be "." or "+"

[Pádraig Brady]

Just a quick follow up to this now archived bug:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=472590

The last message there mentioned selinux query overhead.
On my system with selinux disabled, there is currently
a significant overhead in doing the selinux lookup per file
with a standard `ls -l` listing.
A quick test shows that I can list 100K files in 0.9s
with the selinux lookup commented out, while it increases
to 1.3s when the lookup is done.

I'm not sure how selinux works TBH, but it was mentioned
in the bug that if it's in one file then it's in all.
If this was always true then the selinux lookup would only
need to be done for the first file in the listing?
If not, then perhaps some caching could be added to
at least indicate quickly that selinux is disabled on
the current (file) system.

I know speed isn't that important for ls but it would be nice
to get back the 40% slow down if possible.

cheers,
Pádraig.