Date: Fri, 4 Jan 2019 08:50:10 -0800 From: Brian Neal <brian@aceshardware.com> To: Alejandro Martinez <unledev@gmail.com> Cc: freebsd-hackers@freebsd.org, Garance A Drosehn <drosih@rpi.edu> Subject: Re: Speculative: Rust for base system components Message-ID: <E0CA1E33-C096-44DC-B494-DE3B87237E57@aceshardware.com> In-Reply-To: <CAFwFPkziF%2BEvZ2fEv1fErfmDujPm9UhxvoYUBoCo-%2BtjXtBWmw@mail.gmail.com> References: <ca76e5f7-6e59-bd67-144a-90ad66f0252e@metricspace.net> <7d7bc47d-04cf-2f9b-00a3-e3d9d92b3623@aceshardware.com> <72922F2C-9D27-47AA-BB1C-2DA8589CF008@rpi.edu> <92bd5362-d898-aa12-8f3d-9fbe23f38e0c@aceshardware.com> <CAFwFPkziF%2BEvZ2fEv1fErfmDujPm9UhxvoYUBoCo-%2BtjXtBWmw@mail.gmail.com>
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[-- Attachment #1 --] Sure! Just go to http://godbolt.org/ and type a small program in each language, enter the appropriate compilation flags and compare the output. The function I used took a count as a parameter, iterated through the count, summed up odd numbers and returned the sum. Cheers, -Brian Sent from my iPhone > On Jan 4, 2019, at 3:02 AM, Alejandro Martinez <unledev@gmail.com> wrote: > > Hi Brian, > >> On Tue, Jan 1, 2019 at 7:02 AM Brian Neal <brian@aceshardware.com> wrote: >> >> It was a debug build with no optimization for either compiler. But we >> can easily run a variety of settings for comparison: >> >> Compiler Flags Inst. Count Build Time >> ====================================================================== >> clang 7.0.0 none 33 296ms >> -O3 23 341ms >> rustc 1.31.0 none 110 606ms >> -C opt-level=3 67 643ms >> gcc 8.2 none 37 211ms >> -O2 24 249ms >> -O3 119* 206ms >> >> * With -O3, gcc unrolled and vectorized the loop. The other compilers >> did not emit vectorized code at any of the standard optimization levels. >> >> So, essentially, double the build time and ~3 times the code for the >> same logic. > > Can you share your exact tests so others can replicate? > > Thanks, > Alex > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" [-- Attachment #2 --] 0 *H 010 `He 0 *H 00נ@b%^"10 *H 0:1 0 UUS10U IdenTrust10UTrustID CA A120 180314183331Z 190314183331Z01/0-U &Verified Email: brian@aceshardware.com1%0# *H brian@aceshardware.com1/0- &,d A01427D0000016225C9E54C000172F10"0 *H 0 r_=`{:Y0 O1%8bx4ypw@?Y`a{C>%&^Ί\S␞ E[V ɍ< SJYY蒑 ~^`MQ ɥmM_eϱ*}'V)chLalٳpݱ I E^m`5x u̝a|,$e })쓛d?} T{Iꮅj5_(lx) 00U 0+x0v00+0$http://commercial.ocsp.identrust.com0B+06http://validation.identrust.com/certs/trustidcaa12.p7c0 U #0si5u̠{2kB0 U 0 0,U #0 0 `H/ 0 0J+>https://secure.identrust.com/certificates/policy/ts/index.html0+0This TrustID Certificate has been issued in accordance with IdenTrust's TrustID Certificate Policy found at https://secure.identrust.com/certificates/policy/ts/index.html0EU >0<0:864http://validation.identrust.com/crl/trustidcaa12.crl0!U 0brian@aceshardware.com0 U 3')$ֹUJp|0 U %0++0 *H lMXySVdXy0` 윋r65]89?V0bz3N7 Jq<2!L`{(+NR25 edk`6cr_)j%ǂ5 0rCڤR}Sh YJ9V\AܲUmhi)^|ĩ AK` c$;p@ײ,7{ %V Bт[?S(#CC2szø؎2F.xt100N0:1 0 UUS10U IdenTrust10UTrustID CA A12@b%^"10 `He )0 *H 1 *H 0 *H 1 190104165010Z0/ *H 1" 0cж"&%';dVu0] +71P0N0:1 0 UUS10U IdenTrust10UTrustID CA A12@b%^"10_ *H 1PN0:1 0 UUS10U IdenTrust10UTrustID CA A12@b%^"10 *H wDQkAAQO&z ŸPVV\bmwSjՙ2akPdNC SAxT_GͲ IMeƟRgBWsyqrFl.&F .zY+YuٕTy|6tH Ll8͐G#tז) Vg 롼Կ xN,= Q { j$J_ P 7݉
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