From owner-freebsd-hackers@freebsd.org Tue Jan 1 03:31:52 2019 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id ED8DD1425FBA for ; Tue, 1 Jan 2019 03:31:51 +0000 (UTC) (envelope-from drosih@rpi.edu) Received: from smtp9.server.rpi.edu (smtp9.server.rpi.edu [128.113.2.229]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "canit.localdomain", Issuer "canit.localdomain" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id DFD476B30B for ; Tue, 1 Jan 2019 03:31:50 +0000 (UTC) (envelope-from drosih@rpi.edu) Received: from smtp-auth2.server.rpi.edu (route.canit.rpi.edu [128.113.2.232]) by smtp9.server.rpi.edu (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id x013NVDP003991 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 31 Dec 2018 22:23:31 -0500 Received: from smtp-auth2.server.rpi.edu (localhost [127.0.0.1]) by smtp-auth2.server.rpi.edu (Postfix) with ESMTP id 5F8E518084; Mon, 31 Dec 2018 22:23:31 -0500 (EST) Received: from [192.168.2.33] (cpe-72-224-11-59.nycap.res.rr.com [72.224.11.59]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: drosih) by smtp-auth2.server.rpi.edu (Postfix) with ESMTPSA id 22DBB1805C; Mon, 31 Dec 2018 22:23:31 -0500 (EST) From: "Garance A Drosehn" To: "Brian Neal" Cc: freebsd-hackers@freebsd.org Subject: Re: Speculative: Rust for base system components Date: Mon, 31 Dec 2018 22:23:30 -0500 X-Mailer: MailMate (1.12.3r5579) Message-ID: <72922F2C-9D27-47AA-BB1C-2DA8589CF008@rpi.edu> In-Reply-To: <7d7bc47d-04cf-2f9b-00a3-e3d9d92b3623@aceshardware.com> References: <7d7bc47d-04cf-2f9b-00a3-e3d9d92b3623@aceshardware.com> MIME-Version: 1.0 X-Virus-Scanned: ClamAV using ClamSMTP X-Bayes-Prob: 0.0001 (Score 0, tokens from: outgoing, @@RPTN) X-Spam-Score: 0.00 () [Hold at 10.10] HTML_MESSAGE:0.001 X-CanIt-Incident-Id: 02XiPnvgW X-CanIt-Geo: ip=72.224.11.59; country=US; region=New York; city=Troy; latitude=42.7495; longitude=-73.5951; http://maps.google.com/maps?q=42.7495,-73.5951&z=6 X-CanItPRO-Stream: outgoing X-Canit-Stats-ID: Bayes signature not available X-Scanned-By: CanIt (www . roaringpenguin . com) on 128.113.2.229 X-Rspamd-Queue-Id: DFD476B30B X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dmarc=pass (policy=none) header.from=rpi.edu; spf=pass (mx1.freebsd.org: domain of drosih@rpi.edu designates 128.113.2.229 as permitted sender) smtp.mailfrom=drosih@rpi.edu X-Spamd-Result: default: False [-3.59 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-0.997,0]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:128.113.2.225/28]; NEURAL_HAM_LONG(-1.00)[-0.998,0]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; RCVD_TLS_LAST(0.00)[]; RCVD_COUNT_THREE(0.00)[4]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_MED(-0.20)[229.2.113.128.list.dnswl.org : 127.0.11.2]; RCPT_COUNT_TWO(0.00)[2]; DMARC_POLICY_ALLOW(-0.50)[rpi.edu,none]; MX_GOOD(-0.01)[mail.rpi.edu]; IP_SCORE(-0.02)[country: US(-0.08)]; NEURAL_HAM_SHORT(-0.56)[-0.564,0]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+,1:+]; ASN(0.00)[asn:91, ipnet:128.113.0.0/16, country:US]; MID_RHS_MATCH_FROM(0.00)[] Content-Type: text/plain; format=flowed X-Content-Filtered-By: Mailman/MimeDel 2.1.29 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 Jan 2019 03:31:52 -0000 On 31 Dec 2018, at 23:04, Brian Neal wrote: > This is a good read on some of the pitfalls of Rust: > > https://hackernoon.com/why-im-dropping-rust-fd1c32986c88 > > In terms of performance, take a look at Rust on godbolt...a quick test > I just ran with a trivial program that sums up a sequence of odd > numbers is 29 instructions in C on clang 7.0 and a whopping 137 (!!!) > on rustc 1.31.0! > > Crazy... Did you compile your program as a "release build", or just as a standard (quick) build? -- Garance Alistair Drosehn = drosih@rpi.edu Senior Systems Programmer or gad@FreeBSD.org Rensselaer Polytechnic Institute; Troy, NY; USA