From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2a07:de40:b251:101:10:150:64:1]) by sourceware.org (Postfix) with ESMTPS id 09D6A3858C5F; Fri, 24 Nov 2023 10:21:13 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 09D6A3858C5F Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=suse.cz Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=suse.cz ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 09D6A3858C5F Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=2a07:de40:b251:101:10:150:64:1 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1700821275; cv=none; b=QRd2PuABS9fdLh71B1Ld5d/jVVslqdWF683I0+ag3KTsVyIVZBV6WMASGkSTlNgE1lLWuyRoRp7GZtsR+dB668ejWgdNWY04kaFMlOK61afW30L675If3UIsHu5rYL9jBGv9kjKC/24PGqrXA6QZyYZPsF01VbVCl1TgI5blSWM= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1700821275; c=relaxed/simple; bh=a77YPqftVcnEGQ6503UAQSBdbWlLTfqup3YzhNKtPvQ=; h=DKIM-Signature:DKIM-Signature:From:To:Subject:Date:Message-ID: MIME-Version; b=K0Ku36cwz3t97QkvTDKtXK7j7hCIv4l35bTa1qC13rRepr0Cybz2jBjy8gmo05+nshafe8UvBae9zTF91gGUOfx4eP6ytQmFMTthmbnSVcQLjuu5G6cPz0iTcueFOTApLaGl3B2KyzzN6a7hT9sI9lVqndmpnfsX727W56ryxxE= ARC-Authentication-Results: i=1; server2.sourceware.org Received: from imap2.dmz-prg2.suse.org (imap2.dmz-prg2.suse.org [10.150.64.98]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id F133021D67; Fri, 24 Nov 2023 10:21:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1700821269; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=a77YPqftVcnEGQ6503UAQSBdbWlLTfqup3YzhNKtPvQ=; b=LdzR54wKvTUUlb645gWXrdlFbxiP56s5qp/cHnl1ZD7fwipcJyqJziZK83dIoZpVYmQzfc OEqH3Uv1TvtMLxAcwHISIv96mh4fMo/5ZGxSTuU9T+yX+7ai+uzqDSh7h1fpuNYObkxM0/ rcpMwe96Is/MXdMLYU+2dSQS5giavQQ= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1700821269; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=a77YPqftVcnEGQ6503UAQSBdbWlLTfqup3YzhNKtPvQ=; b=AGs0PnScS0alun1CiXnycG7R53x68k5QxMksPJuAOHHel28AE67v65SYf2Jx5DN9nW6mWv hxgIex10UmXJrUCw== Received: from imap2.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap2.dmz-prg2.suse.org (Postfix) with ESMTPS id D84A1139E8; Fri, 24 Nov 2023 10:21:09 +0000 (UTC) Received: from dovecot-director2.suse.de ([10.150.64.162]) by imap2.dmz-prg2.suse.org with ESMTPSA id 04inMhV5YGVYXQAAn2gu4w (envelope-from ); Fri, 24 Nov 2023 10:21:09 +0000 From: Martin Jambor To: Jonathan Wakely , Jan Hubicka Cc: Matthias Kretz , rguenther@suse.de, libstdc++@gcc.gnu.org, gcc-patches@gcc.gnu.org Subject: Re: libstdc++: Speed up push_back In-Reply-To: References: <11345207.nUPlyArG6x@minbar> User-Agent: Notmuch/0.37 (https://notmuchmail.org) Emacs/29.1 (x86_64-suse-linux-gnu) Date: Fri, 24 Nov 2023 11:21:05 +0100 Message-ID: MIME-Version: 1.0 Content-Type: text/plain Authentication-Results: smtp-out1.suse.de; none X-Spam-Score: 2.40 X-Spamd-Result: default: False [2.40 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; BAYES_HAM(-0.00)[38.27%]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; TAGGED_RCPT(0.00)[]; MIME_GOOD(-0.10)[text/plain]; RCPT_COUNT_FIVE(0.00)[6]; RCVD_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; INVALID_MSGID(1.70)[]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; MID_RHS_NOT_FQDN(0.50)[]; RCVD_TLS_ALL(0.00)[]; SUSPICIOUS_RECIPS(1.50)[] X-Spam-Status: No, score=-4.6 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,INVALID_MSGID,SPF_HELO_NONE,SPF_PASS,TXREP,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: Hello, On Thu, Nov 23 2023, Jonathan Wakely wrote: > On Thu, 23 Nov 2023 at 15:34, Jan Hubicka wrote: >> [...] >> >> I also wonder, if default operator new and malloc can be handled as not >> reading/modifying anything visible to the user code. > > No, there's no way to know if the default operator new is being used. > A replacement operator new could be provided at link-time. > > That's why we need -fsane-operator-new > Would it make sense to add -fsane-operator-new to -Ofast? Martin