From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Daniel Colascione Newsgroups: gmane.emacs.devel Subject: Re: Emacs rewrite in a maintainable language Date: Tue, 13 Oct 2015 18:43:40 -0700 Message-ID: <561DB34C.9080500@dancol.org> References: <561A19AB.5060001@cumego.com> <87io6dl0h0.fsf@wanadoo.es> <87lhb82qxc.fsf@gmail.com> <87oag4jk74.fsf@wanadoo.es> <87y4f784aj.fsf@fencepost.gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="3018EVgRVEWwSfRIvi48Pg63xIwBA9P2M" X-Trace: ger.gmane.org 1444787106 529 80.91.229.3 (14 Oct 2015 01:45:06 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 14 Oct 2015 01:45:06 +0000 (UTC) To: David Kastrup , emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed Oct 14 03:45:04 2015 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZmB7k-0001Wk-91 for ged-emacs-devel@m.gmane.org; Wed, 14 Oct 2015 03:45:00 +0200 Original-Received: from localhost ([::1]:40079 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZmB7j-0000gn-CI for ged-emacs-devel@m.gmane.org; Tue, 13 Oct 2015 21:44:59 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:41509) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZmB6h-0000Xj-7o for emacs-devel@gnu.org; Tue, 13 Oct 2015 21:43:56 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZmB6f-0002nI-N2 for emacs-devel@gnu.org; Tue, 13 Oct 2015 21:43:55 -0400 Original-Received: from dancol.org ([2600:3c01::f03c:91ff:fedf:adf3]:43057) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZmB6f-0002mW-D1; Tue, 13 Oct 2015 21:43:53 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=dancol.org; s=x; h=Content-Type:In-Reply-To:MIME-Version:Date:Message-ID:From:References:To:Subject; bh=ebokCF/HNYt/56Tp1heMX10Sl/2OLSgkT1WDmC65GyY=; b=Jx1iLKSNx8HkhUq1ghjf1V9s/MH3pm18O7QkqLa0wuloroQ4s+awjy8uLJGX/JWwovwae+t/5tOVFj55X5ggrApPuIPGb5uBWjNIot5g9V6yJ4OeYMETe6GGPXMPHR594CTADqnczrxoyfHlG+D5eYb3Raf04xpYGDp8ip89DvqrC6aJxlAtLqXP8cdBdtSAHdpO9lSPfuEkHTUQgQLjPii7gGNJZKcfCHwTivb/JVEakx+CmQhzcyQDwnBZGxjuycLq45twXyG2kUIILltT5nWuRfoYmuU8Kjt7x62j6ap/NhZJnsFAcpw+sjWCyMOB+QLE7Zqn8A60zQvctwDZMw==; Original-Received: from [2620:10d:c090:200::5:7a3e] (helo=[IPv6:2620:10d:c083:10fb:2ab2:bdff:fe1c:db58]) by dancol.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.84) (envelope-from ) id 1ZmB6X-0001T4-ND; Tue, 13 Oct 2015 18:43:45 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 In-Reply-To: <87y4f784aj.fsf@fencepost.gnu.org> X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2600:3c01::f03c:91ff:fedf:adf3 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 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.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:191522 Archived-At: This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --3018EVgRVEWwSfRIvi48Pg63xIwBA9P2M Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable On 10/13/2015 03:13 AM, David Kastrup wrote: > John Wiegley writes: >=20 >>>>>>> Ken Raeburn writes: >> >>>> The main reason I stopped is that it didn't help performance enough.= The >>>> slowness imposed by constantly looking up symbol names at global sco= pe, due >>>> to dynamic binding, dominated the profiling results. >> >>> Do you think the introduction of lexical binding support changes the = balance >>> much? (Or was your work after lexical binding was added?) >> >> I think it should really help performance, but I haven't measured yet.= >=20 > I don't think it will really help performance all that much if you > measure it now since the inescapable cost of establishing and resolving= > dynamic bindings at every let or function boundary has both made certai= n > optimizations mostly pointless as well as lending preference to a > programming style using iteration and setq rather than recursive > techniques. Maybe it's blasphemous to say so, but I often find iterate code much more comprehensible and easily modified than equivalent logic written recursively. --3018EVgRVEWwSfRIvi48Pg63xIwBA9P2M Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBCAAGBQJWHbNMAAoJEN4WImmbpWBl6S4P/A/yaDqs9fk0n6en9Vg6h2u5 WyFzLvu7gX427CneuJFV4VySiMO9akcl8/+6PpOxcI8oBXGnhgjuF4BhTqfBQaxG +lvmHBB49siC3ULlRP4lpUMeOrNM2lppSVb4SzD+ugvjMWVoeTJ/pR1nH2smEkK/ HLvsjeGFmiKmZWyQ2Bik40YJmUedhQx6rxGaLhWtP13xmgPzo+9bhHgqsJxQtGWf biqLuTXtIIerk7NMpka8X1hCz3nLGvV8GD08SIeM9BOjx6WwC5P/vitHyhGDAsIl AI+cBJJEl470Byd2Zd8nqYWasph//aVpRVBGlHVaoK1WTLOSug/125764V6haorq DkBhXdSa3ScA/4z9rIYt1z0jNsU7YNCWYSGrDb0vGhI/xNhsOqDoH0xhNZ/BkRy3 M10i0pIizodiP8/R7eWRyHUz/4MPoQDA+g5rwX4Merg2XvXk+AAtUDQiWREtulkN lNkhpfejXC0O9YiMbsAgJgUbXG44fl//f5HFNpSlHY8uizl+V1m66SX/pTGYzNUQ JkFTJpzHNFcu/ucjvk22DzwqTycPOz+3NrPayij4BBDYYopG75ThP49Hn0yY5y+p DVh8W1qMmnHiQT1db1+dPc4wS8kpnsLz8KDo+AAI5RbH0qPg+afvcnXb9trRdkUn upfrHkG3xkQ08LwBeKKX =6ETg -----END PGP SIGNATURE----- --3018EVgRVEWwSfRIvi48Pg63xIwBA9P2M--