Jim Meyering <jim@xxxxxxxxxxxx> wrote:
> This morning I noticed a flagrant difference in the speed of
> "make install" for the just-released gettext-0.17. It took 12(!)
> times longer on a rawhide system than on a usually-slower debian
> unstable system. (3min vs. 15s)
FYI,
Dan Walsh suggested to use
matchpathcon_init_prefix (NULL, "/first_component_of_abs_dest/");
to limit the number of regular expressions matchpathcon will have to
compile. That works very well, as long as you're not installing into
/usr, in which case it's still better than nothing. When installing
into /tmp, the example above takes 21-22 seconds, rather than 180.
Much better. However, installing into /usr/tmp still required about 70
seconds, so there's room for improvement.
I've implemented that, but haven't finished testing.
For reference, the gettext installation process invokes
install -c -m ... src_file dst_file
1278 times.
Another suggestion:
- avoid using matchpathcon altogether when there's an existing
destination file: use its context, instead.
I'm not convinced that this is necessary.
Other opinions?
--
This message was distributed to subscribers of the selinux mailing list.
If you no longer wish to subscribe, send mail to majordomo@xxxxxxxxxxxxx with
the words "unsubscribe selinux" without quotes as the message.
