From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Yuri Khan Newsgroups: gmane.emacs.devel Subject: Re: Display of undisplayable characters: \U01F3A8 instead of diamond Date: Wed, 7 Sep 2022 20:58:53 +0700 Message-ID: References: <83y1v7w6eu.fsf@gnu.org> <2f302d1c3966849477b3@heytings.org> <83mtbiovzr.fsf@gnu.org> <83a67hq3l7.fsf@gnu.org> <83mtbhneht.fsf@gnu.org> <83czcakqd3.fsf@gnu.org> <87a67dxhfw.fsf@dataswamp.org> <875yi0wzx7.fsf@dataswamp.org> <834jxkk635.fsf@gnu.org> <878rmw8085.fsf@dataswamp.org> <83edwnj4fh.fsf@gnu.org> <87tu5j7tu1.fsf@dataswamp.org> <83a67bih0f.fsf@gnu.org> <83tu5jgvfy.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="2144"; mail-complaints-to="usenet@ciao.gmane.io" Cc: incal@dataswamp.org, emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Wed Sep 07 15:59:47 2022 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oVvak-0000SX-Dz for ged-emacs-devel@m.gmane-mx.org; Wed, 07 Sep 2022 15:59:46 +0200 Original-Received: from localhost ([::1]:37920 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oVvaj-0006LC-2K for ged-emacs-devel@m.gmane-mx.org; Wed, 07 Sep 2022 09:59:45 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:50804) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oVvaA-0005Sg-5n for emacs-devel@gnu.org; Wed, 07 Sep 2022 09:59:10 -0400 Original-Received: from mail-wm1-x32d.google.com ([2a00:1450:4864:20::32d]:55179) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oVva8-0002PC-LU; Wed, 07 Sep 2022 09:59:09 -0400 Original-Received: by mail-wm1-x32d.google.com with SMTP id s23so8806444wmj.4; Wed, 07 Sep 2022 06:59:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date; bh=9Oh5N72nhxUCJAzyTnUqQEXujuiJbQsXuxP4mYwHkQI=; b=CkjutqGPU262B8M7hY2HSl3z06Bs9oDxrQHoMeMUIdw8C3pNMCZNJIiB3xEeOg2Tls is8IZhC0VWrn1IWMJXvW7hG1i7hY9x0g6mfr/XItD4ERuECmPXju+agbz2fVdC2K8XGU zPC47N0GeumDsBzk2bx9rIfpMSN8v3IU0BDI4wSyPN7soDqfYPf1gzGEdWBO5xTNHy33 hqDr/FRdQ8fFpI3114dkjCufFK6SYyFXO7qfaspyrEwQDd8rWwXeLUjPmC3BvVypHfpO kZmAHBg215k3vJsumqK0Zpw/gJiPGICHF/0T4ZdhWZnLGShRw/vYrsxv/ZhyL012TnGN wSBg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date; bh=9Oh5N72nhxUCJAzyTnUqQEXujuiJbQsXuxP4mYwHkQI=; b=h2TpnOr79IzpKxu4/A5KNeS40GQneCXPTw8M2/H/j2xTbrty6c3nDCF+a8C7TlPPMI 3u8lHSoJY32gcFB39jUQrR7pvS7g9Fp+Nnydtfn39CSupwADb69612bQnk3VrV8M7QCw S81FOosUz/Xfi3DJmji301PskJ2exmn9WZrElQJA0q/9L2YEkUKwf2aTUVpv61f1iK+p s3cm2KV00UTHM/nYsDxYnCVasojn9vhHLyJ+yRIQ2TJzgEEmezB6hQMrP19pJCXL/PJG EmT7q40xlD/Qa5y65BpTUwW7OVkbq8te0yaiU4tnp4hFyxiO82exS3wQNW3xMHS8kywG 9Pzg== X-Gm-Message-State: ACgBeo2RXZVe8878d74RKugPxaZiOA7iIeHq853ZtN9DJcy+4MKd8Rrs eNoY54pWzVGgd6D+/B1tyo9uqg0a0U29VuseGw7fTnRgrqBz8A== X-Google-Smtp-Source: AA6agR4jPVOnB0lQSQgmBDZbSdKO48R7PBzjdB00m/4C+58D22Q8aPnNeK5rw6ZqA6axp0h3bPygnI5dsFGW83WlO48= X-Received: by 2002:a05:600c:600c:b0:3a5:abdc:8ce4 with SMTP id az12-20020a05600c600c00b003a5abdc8ce4mr16504563wmb.144.1662559146081; Wed, 07 Sep 2022 06:59:06 -0700 (PDT) In-Reply-To: <83tu5jgvfy.fsf@gnu.org> Received-SPF: pass client-ip=2a00:1450:4864:20::32d; envelope-from=yurivkhan@gmail.com; helo=mail-wm1-x32d.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:294841 Archived-At: On Wed, 7 Sept 2022 at 20:34, Eli Zaretskii wrote: > > I believe Emanuel is alluding to the memoization pattern =E2=80=9Cif a > > computation (e.g. of the set of all displayable characters) is too > > expensive to perform every time its result is needed, cache the result > > in some storage that survives between the times it is needed (e.g. a > > data file in .emacs.d/var/)=E2=80=9D. > > That's exactly what the instructions produced with the code suggest... Um, no? This is code generation, a different pattern where slow code generates fast code that needs to be included in the actual program (in this case, user=E2=80=99s init file). Code generation: * M-x standard-display-by-replacement-char RET. * It pauses for a while, gives you some comments and code. * At a minimum, you have to read and understand the comment. * Then you copy and paste that code in your init file and optionally evaluate it for immediate effect. Compare with caching/memoization: * M-x some-hypothetical-other-command RET. * It pauses for a while, stores a data file, has an immediate effect. * You see the effect, decide that it is good, put (some-hypothetical-other-command) in your init file. * On the next startup, it reads the file (which is fast), applies the data (which is supposedly also fast), has the same effect. The file name could include some relevant factors such as the terminal type on which the data depends.