From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <sourceware-bugzilla@sourceware.org>
Received: by sourceware.org (Postfix, from userid 48)
 id 8B9753860C32; Fri, 18 Jun 2021 13:08:28 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 8B9753860C32
From: "gprocida at google dot com" <sourceware-bugzilla@sourceware.org>
To: libabigail@sourceware.org
Subject: [Bug default/27995] New: abidiff performance regression
Date: Fri, 18 Jun 2021 13:08:28 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: libabigail
X-Bugzilla-Component: default
X-Bugzilla-Version: unspecified
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: gprocida at google dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: dodji at redhat dot com
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter cc target_milestone
 attachments.created
Message-ID: <bug-27995-9487@http.sourceware.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: libabigail@sourceware.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Mailing list of the Libabigail project <libabigail.sourceware.org>
List-Unsubscribe: <https://sourceware.org/mailman/options/libabigail>,
 <mailto:libabigail-request@sourceware.org?subject=unsubscribe>
List-Archive: <https://sourceware.org/pipermail/libabigail/>
List-Help: <mailto:libabigail-request@sourceware.org?subject=help>
List-Subscribe: <https://sourceware.org/mailman/listinfo/libabigail>,
 <mailto:libabigail-request@sourceware.org?subject=subscribe>
X-List-Received-Date: Fri, 18 Jun 2021 13:08:28 -0000

https://sourceware.org/bugzilla/show_bug.cgi?id=3D27995

            Bug ID: 27995
           Summary: abidiff performance regression
           Product: libabigail
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: default
          Assignee: dodji at redhat dot com
          Reporter: gprocida at google dot com
                CC: libabigail at sourceware dot org
  Target Milestone: ---

Created attachment 13501
  --> https://sourceware.org/bugzilla/attachment.cgi?id=3D13501&action=3Ded=
it
XML file for self-comparison

abidiff comparing XML with identical XML has become a lot slower, at least =
for
certain Android kernel ABI XML files.

Run time changes from 3-5 seconds to more than 5 minutes. This does cause
trouble with test infrastructure etc.

I've bisected this to the following recent commit:

7a9fa3fe5a823d1627e83571dd862b3f07196ae0 "abixml reader: Fix recursive type
definition handling"

I'll try to do some profiling today. A sample XML file that triggers this is
attached.

--=20
You are receiving this mail because:
You are on the CC list for the bug.=