From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 144393858C66; Mon, 12 Feb 2024 10:45:03 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 144393858C66 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1707734703; bh=IY3oEh6Fn4sWN2+QWCi6LKETnHNrh6vteqD3A/jiW3k=; h=From:To:Subject:Date:In-Reply-To:References:From; b=hc376Dshx89Hh9a/7hFioUU1juK1YTvmH9NEKMOTymDhNNRfTiQFsmeMoW3SJk8jJ Lii9y7Cjf+4Px+lrq4KbGeIvrDIxyLhM9tunFOEZJEkQZW/KMX/zFND7sF9Fp1NpeI qMzgd7ONMeHkPVOwVrIiJAo8WcgMFSzQJr0dLcyg= From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/113835] [13/14 Regression] compiling std::vector with const size in C++20 is slow Date: Mon, 12 Feb 2024 10:45:02 +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: 13.2.1 X-Bugzilla-Keywords: compile-time-hog X-Bugzilla-Severity: normal X-Bugzilla-Who: jakub at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 13.3 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc 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=3D113835 Jakub Jelinek changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org, | |ppalka at gcc dot gnu.org --- Comment #3 from Jakub Jelinek --- The most significant slowdown (though just approximate, I've been bisecting that in an mostly -O0 built compiler) is r13-6421-gcbaa1d9c218d9c0b5e34e510a462ff4e299a0f3f Though, no idea what could be done against it, because the standard requires that...=