From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-406467-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 16840 invoked by alias); 13 Nov 2012 10:01:19 -0000
Received: (qmail 15405 invoked by uid 48); 13 Nov 2012 10:00:02 -0000
From: "markus at trippelsdorf dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/55309] New: gcc's address-sanitizer 66% slower than clang's
Date: Tue, 13 Nov 2012 10:01:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: other
X-Bugzilla-Keywords:
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: markus at trippelsdorf dot de
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Changed-Fields:
Message-ID: <bug-55309-4@http.gcc.gnu.org/bugzilla/>
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
Content-Type: text/plain; charset="UTF-8"
MIME-Version: 1.0
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2012-11/txt/msg01129.txt.bz2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55309

             Bug #: 55309
           Summary: gcc's address-sanitizer 66% slower than clang's
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: other
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: markus@trippelsdorf.de


Comparing gcc build times:
CC="clang -fsanitize=address -w" CXX="clang++ -fsanitize=address -w"
~/gcc/configure --disable-bootstrap --disable-werror --disable-multilib
--enable-languages=c,c++
with
CC="gcc -faddress-sanitizer" CXX="g++ -faddress-sanitizer" ...
and
CC="gcc -fno-var-tracking -faddress-sanitizer" CXX="g++ -fno-var-tracking
-faddress-sanitizer" ...

Clang : nice -n 19 make -j4  1173.74s user 104.73s system 325% cpu 6:32.18
total
gcc   : nice -n 19 make -j4  3653.30s user 122.27s system 369% cpu 17:00.77
total
gcc_no: nice -n 19 make -j4  2925.20s user 116.42s system 357% cpu 14:11.52
total

"perf top" shows references_value_p() and value_member() on top.