From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: Knowing where a function has been used (bis) [Was: Re: Optimising Elisp code] Date: Thu, 11 Oct 2018 22:05:21 +0200 Organization: Aioe.org NNTP Server Message-ID: <8636tcl05a.fsf@zoho.com> References: <638fb7dc-6fc5-4645-8793-97a00038a3a8@googlegroups.com> <8hxojvzzzzzz.m4h.xxuns.g6.gal@portable.galex-713.eu> <20181006192457.GB7368@tuxteam.de> <86lg79yl54.fsf@zoho.com> <86d0slrb4h.fsf@zoho.com> <86d0sknoud.fsf@zoho.com> <86tvlvmxtz.fsf@zoho.com> <86woqprcdb.fsf@zoho.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1539288505 27480 195.159.176.226 (11 Oct 2018 20:08:25 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 11 Oct 2018 20:08:25 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4 (gnu/linux) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Thu Oct 11 22:08:21 2018 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1gAhFs-00073B-Ql for geh-help-gnu-emacs@m.gmane.org; Thu, 11 Oct 2018 22:08:20 +0200 Original-Received: from localhost ([::1]:36914 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gAhHz-0002NJ-Cq for geh-help-gnu-emacs@m.gmane.org; Thu, 11 Oct 2018 16:10:31 -0400 Original-Path: usenet.stanford.edu!goblin3!goblin1!goblin.stu.neva.ru!news.albasani.net!news.mixmin.net!aioe.org!.POSTED!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 39 Original-NNTP-Posting-Host: IYul6C8CwghWjVz/CRhiVw.user.gioia.aioe.org Original-X-Complaints-To: abuse@aioe.org Mail-Copies-To: never X-Notice: Filtered by postfilter v. 0.8.3 Cancel-Lock: sha1:PiyXvpWa+XGF+y67lRsSJHfwsLU= Original-Xref: usenet.stanford.edu gnu.emacs.help:224128 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.org gmane.emacs.help:118254 Archived-At: Barry Margolin wrote: > Long functions are often long because of > complex logic, which can be hard to extract > into separate functions. > > Also, we tend to extract code into separate > functions only when there's some logic to it > -- it has to have a meaningful identity > outside the function where it exists. > If a function can only be used in one place, > and refers to lots of the variables in that > caller, then it's often hard to justify > splitting it out -- it actually makes things > more confusing because the modularity doesn't > make sense. Complexity isn't reduced by having tons of stuff in a single function that goes on forever- on the contrary, this makes it more difficult to read, understand, and maintain. But of course the modularity should make sense! > I doubt that anyone makes decision about > whether to split large functions into > separate functions based on the overhead of > function calling. This is what the Gnus people told me when I suggested not writing functions that are longer and deeper than a novel by Dostoevsky - they said, ~"Gnus is slow, Elisp is slow, making neat modules of those defuns will make it even slower." -- underground experts united http://user.it.uu.se/~embe8573