From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of text editors" Newsgroups: gmane.emacs.bugs Subject: bug#64391: buffer narrowing slowdown regression in emacs 29 Date: Sun, 09 Jul 2023 15:42:04 -0400 Message-ID: References: <87r0psb51z.fsf@ust.hk> <26cee506f708f3c6cfe1@heytings.org> <26cee506f70bbc9de58b@heytings.org> <83h6qghpdc.fsf@gnu.org> <26cee506f77e9c87e325@heytings.org> <06A8380F-08A6-464E-9946-02F8498031EC@gmail.com> <239e2a5aa11924a2f1d3@heytings.org> <239e2a5aa14d33c1b087@heytings.org> <83jzv9bp0a.fsf@gnu.org> <17bc5861309c808fe41c@heytings.org> <831qhhbh60.fsf@gnu.org> <17bc5861306adf83809a@heytings.org> <837cr99gz1.fsf@gnu.org> <17bc58613018aff5cea9@heytings.org> <17bc58613033230eb631@heytings.org> Reply-To: Stefan Monnier Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="9689"; 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Sun, 9 Jul 2023 15:42:05 -0400 (EDT) In-Reply-To: <17bc58613033230eb631@heytings.org> (Gregory Heytings's message of "Sun, 09 Jul 2023 19:19:43 +0000") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:264860 Archived-At: > Whoops, indeed. (symbolp (eval (cadr rest))) would work, No, it wouldn't work: we can't (in general) decide at macroexpansion time whether the expression will return a symbol at runtime. > but somehow I think it's not TRT and there's a more idiomatic way to > do that. Yes: don't do it, or do it via a runtime check rather than a compile-time check. But here I don't see any benefit to imposing that LABEL evaluates to a symbol. Stefan