Date: Sun, 1 Jul 2007 20:20:09 GMT From: "Vyacheslav Silakov" <seal@inar.ru> To: freebsd-bugs@FreeBSD.org Subject: Re: bin/112613: 'ls -l' is very slow or doesn't work at all Message-ID: <200707012020.l61KK9J5088188@freefall.freebsd.org>
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The following reply was made to PR bin/112613; it has been noted by GNATS.
From: "Vyacheslav Silakov" <seal@inar.ru>
To: <bug-followup@FreeBSD.org>
Cc:
Subject: Re: bin/112613: 'ls -l' is very slow or doesn't work at all
Date: Sun, 1 Jul 2007 23:57:45 +0400
Ok... ;)
I've a look into ls.c.
It seems to be a performance problem around string #702
[...]
user = user_from_uid(sp->st_uid, 0);
[...]
My /etc/passwd contains about 10,000 records and /var/mail directory
contains about 10,000 mailboxes. Probably 'user_from_uid' function is doing
something wrong.
Original timing:
# time ls -l /var/mail
[...]
1572.20 real 133.71 user 790.94 sys
But when I'm changed
user = user_from_uid(sp->st_uid, 0);
to
user = "blablabla";
result is:
# time ./ls -l /var/mail
[...]
17.01 real 0.20 user 0.22 sys
p.s. 'deco' program works fine because it doesn't use 'user_from_uid'
function calls.
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