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Fri, 13 May 2016 01:27:34 -0700 (PDT) MIME-Version: 1.0 X-Received: by 10.31.139.139 with SMTP id n133mr7292871vkd.71.1463128054571; Fri, 13 May 2016 01:27:34 -0700 (PDT) Received: by 10.103.84.67 with HTTP; Fri, 13 May 2016 01:27:34 -0700 (PDT) In-Reply-To: <5734DFBF.8070202@bioquant.uni-heidelberg.de> References: <5734DFBF.8070202@bioquant.uni-heidelberg.de> Date: Fri, 13 May 2016 09:27:34 +0100 Message-ID: From:Mark Shinwell To:Nils Becker Cc:Gabriel Scherer , caml users Content-Type: text/plain; charset=UTF-8 X-JS-Processed-by: mailcore X-Validation-by: mshinwell@janestreet.com Subject: Re: [Caml-list] flambda optimization settings Thanks for these numbers, which I think are about in line with expectations. At present the optimisation flags such as -O3 only need to be specified when compilation (rather than linking) is occurring. So if your link command only lists previously-compiled files, there is no need to specify such options. Mark On 12 May 2016 at 20:55, Nils Becker wrote: > >> Thus, it would be interesting and important to also compare with the >> code produced by a 4.03 switch compiled without flambda. > > coming right up > > (different parameters, different machine, best of 5 -- it varies quite a > lot) > > time (ocamlbuild -clean; ocamlbuild facs_run.native) > 4.03.0 1.36s > 4.03.0+flambda > Oclassic 1.68s > O2 2.1s > O3 2.80s > > > the actual run: time ./facs_run.native > > 4.03.0 23.3s > 4.03.0+flambda > Oclassic 24.2s > O2 22.7s > O3 20.1s > > > so it seems compilation on flambda classic is still a bit slower than > non-flambda; as is the run time. the gains of O3 over non-flambda are > still significant, as is the difference O2 vs O3. > > n > > -- > Caml-list mailing list. Subscription management and archives: > https://sympa.inria.fr/sympa/arc/caml-list > Beginner's list: http://groups.yahoo.com/group/ocaml_beginners > Bug reports: http://caml.inria.fr/bin/caml-bugs