From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Dmitry Gutov Newsgroups: gmane.emacs.devel Subject: Re: A faster derived-mode-p Date: Mon, 15 Feb 2021 04:34:21 +0200 Message-ID: <81fe6c00-f177-f010-8e80-5a49252546fa@yandex.ru> References: <87k0ra9z7w.fsf@gnus.org> <428be4d8-9b35-c581-1357-20bb6ecb1ed8@yandex.ru> <878s7q9slc.fsf@tcd.ie> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="37494"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 Cc: Lars Ingebrigtsen , emacs-devel@gnu.org To: "Basil L. 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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:264821 Archived-At: On 15.02.2021 00:45, Basil L. Contovounesios wrote: > That's not counting the obarray's buckets. I get ~6x as many results in > my session with (length (all-completions "" obarray #'commandp)) Oh, you're right, thanks. Still, that gives an estimate of how many times the function will be called in an average session. And (benchmark 10000 '(derived-mode-p 'prog-mode)) prints ~0.01s here (unless caught in a GC).