From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 2FA753858D32; Sat, 21 Jan 2023 23:50:25 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 2FA753858D32 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1674345025; bh=xDu5saQ5ZOJEcf+FgXQaIeiKFHId/eUK9niDdJ2C+9s=; h=From:To:Subject:Date:In-Reply-To:References:From; b=RaWO7ULDRirZlgroJB7mKST9U8JXo8CovNRFaio+AVdDniSVwCkrKLqmkj5SLGCCi zhSIOXavUfSIUiAgPCC3yru1k8GJWTDbhglh+qzYfM7q1Qq4EDJwNBzGyvSxqolUqX sWbLNsl0XKZQohtz1XjyL7Kd3S3G9eMcKZgQGPJE= From: "redi at gcc dot gnu.org" 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: Sat, 21 Jan 2023 23:50:24 +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: redi at gcc dot gnu.org 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: see_also keywords 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 Jonathan Wakely changed: What |Removed |Added ---------------------------------------------------------------------------- See Also| |https://gcc.gnu.org/bugzill | |a/show_bug.cgi?id=3D100070 Keywords|needs-bisection | --- Comment #5 from Jonathan Wakely --- See https://cplusplus.github.io/LWG/issue3291 for the rationale. See PR 100070 for suggestions to deal with such iterators better.=