From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: ludo@gnu.org (Ludovic =?iso-8859-1?Q?Court=E8s?=) Newsgroups: gmane.lisp.guile.devel Subject: Re: Why bother porting Guile to BDW-GC? Date: Sun, 09 Nov 2008 19:25:49 +0100 Message-ID: <87ljvsvjrm.fsf@gnu.org> References: <87skq2jjl4.fsf@gnu.org> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1226255186 675 80.91.229.12 (9 Nov 2008 18:26:26 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 9 Nov 2008 18:26:26 +0000 (UTC) To: guile-devel@gnu.org Original-X-From: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Sun Nov 09 19:27:29 2008 connect(): Connection refused Return-path: Envelope-to: guile-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1KzF0I-0006BA-QD for guile-devel@m.gmane.org; Sun, 09 Nov 2008 19:27:19 +0100 Original-Received: from localhost ([127.0.0.1]:48808 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1KzEzA-0001ia-TW for guile-devel@m.gmane.org; Sun, 09 Nov 2008 13:26:08 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1KzEz4-0001iO-MU for guile-devel@gnu.org; Sun, 09 Nov 2008 13:26:02 -0500 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1KzEz4-0001iB-6Z for guile-devel@gnu.org; Sun, 09 Nov 2008 13:26:02 -0500 Original-Received: from [199.232.76.173] (port=46456 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1KzEz4-0001i8-15 for guile-devel@gnu.org; Sun, 09 Nov 2008 13:26:02 -0500 Original-Received: from main.gmane.org ([80.91.229.2]:46076 helo=ciao.gmane.org) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1KzEz3-0008Rs-CT for guile-devel@gnu.org; Sun, 09 Nov 2008 13:26:01 -0500 Original-Received: from list by ciao.gmane.org with local (Exim 4.43) id 1KzEyx-000725-Q5 for guile-devel@gnu.org; Sun, 09 Nov 2008 18:25:55 +0000 Original-Received: from reverse-83.fdn.fr ([80.67.176.83]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 09 Nov 2008 18:25:55 +0000 Original-Received: from ludo by reverse-83.fdn.fr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 09 Nov 2008 18:25:55 +0000 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 27 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: reverse-83.fdn.fr X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 19 Brumaire an 217 de la =?iso-8859-1?Q?R=E9volution?= X-PGP-Key-ID: 0xEA52ECF4 X-PGP-Key: http://www.fdn.fr/~lcourtes/ludovic.asc X-PGP-Fingerprint: 821D 815D 902A 7EAB 5CEE D120 7FBA 3D4F EB1F 5364 X-OS: i686-pc-linux-gnu User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.3 (gnu/linux) Cancel-Lock: sha1:bngtpXTSfPCwMfpXsHRCv6eOPIg= X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6, seldom 2.4 (older, 4) X-BeenThere: guile-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Developers list for Guile, the GNU extensibility library" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Errors-To: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.lisp.guile.devel:7817 Archived-At: Hi, Han-Wen Nienhuys writes: > I'm all for scrapping code; here are my concerns: > > - what is the performance impact? > > - does BDW GC handle weak references correctly? > > - What about various (undoubtedly little used) areas where GC interacts > with the interpreter: port de-allocation, guardians, etc. I talked about most of these in [0]. While weak hash tables are fully functional, there is a subtle difference in how they behave that I haven't addressed yet [1]. Apart from that, the only incompatibility I know of is the lack of `gc-live-object-stats', which can certainly be implemented but is just slightly boring to do. ;-) Thanks, Ludo'. [0] http://thread.gmane.org/gmane.lisp.guile.devel/5946 [1] http://thread.gmane.org/gmane.comp.programming.garbage-collection.boehmgc/2465