From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 0A4B73858D33; Sun, 22 Jan 2023 03:07:07 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 0A4B73858D33 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1674356827; bh=FkXyO0737Ya7Cr1TTIVK5EDjy1T+1c0rCIpIEmQZpHk=; h=From:To:Subject:Date:In-Reply-To:References:From; b=PAIbNXWKhog8232pB4y2HOQZuKbvWzC+HOnjlkmeecNBb1FUo7ao7epMEsV4lE6WB 01bGE9JwzDr4brgj0V7WK0A5jQwRKaPk9ZiUy7TZJubR5Ai+15ARNBhmFOB1tQj+qJ aG72SWm1t7el5mFs459WbbdcV5F05Mb6JXKvxSU8= From: "Mark_B53 at yahoo dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/108487] [10/11/12/13 Regression] ~20-30x slowdown in populating std::vector from std::ranges::iota_view Date: Sun, 22 Jan 2023 03:07:06 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: libstdc++ X-Bugzilla-Version: 12.2.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: Mark_B53 at yahoo dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108487 --- Comment #7 from MARK BOURGEAULT --- >> See PR 100070 for suggestions to deal with such iterators better. Unless I'm missing something, there's nothing in that PR that a *user* can = do to achieve the gcc 10.3 performance w/ std::iota_view.=