From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM autolearn=unavailable autolearn_force=no version=3.4.4 X-Received: by 10.107.40.4 with SMTP id o4mr1875711ioo.75.1497327271294; Mon, 12 Jun 2017 21:14:31 -0700 (PDT) X-Received: by 10.157.84.36 with SMTP id j36mr84876oth.9.1497327271255; Mon, 12 Jun 2017 21:14:31 -0700 (PDT) Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!news.eternal-september.org!feeder.eternal-september.org!news.glorb.com!185no493126itv.0!news-out.google.com!m134ni1513itb.0!nntp.google.com!f20no492802itb.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail Newsgroups: comp.lang.ada Date: Mon, 12 Jun 2017 21:14:30 -0700 (PDT) In-Reply-To: <65d29678-4614-4709-b405-fcb70dfcb2f3@googlegroups.com> Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=2601:191:8303:2100:5985:2c17:9409:aa9c; posting-account=fdRd8woAAADTIlxCu9FgvDrUK4wPzvy3 NNTP-Posting-Host: 2601:191:8303:2100:5985:2c17:9409:aa9c References: <65c5271c-33a1-4f36-977e-372af449d9c1@googlegroups.com> <84e92c0f-8877-496d-b295-cf590e047ed4@googlegroups.com> <65d29678-4614-4709-b405-fcb70dfcb2f3@googlegroups.com> User-Agent: G2/1.0 MIME-Version: 1.0 Message-ID: Subject: Re: Poor performance with GNAT-GPL-2017 From: Robert Eachus Injection-Date: Tue, 13 Jun 2017 04:14:31 +0000 Content-Type: text/plain; charset="UTF-8" Xref: news.eternal-september.org comp.lang.ada:46939 Date: 2017-06-12T21:14:30-07:00 List-Id: Doing some simple arithmetic: > gnat-gpl-2017 > > $ ./bin/tangle > using: 8 tasks duration 851 ms x 8 = 6.808 > > $ ./bin/tangle -t4 > using: 4 tasks duration 1.213 ms x 4 = 4.852 > > $ ./bin/tangle -t2 > using: 2 tasks duration 2.346 ms x 2 = 4.692 > > $ ./bin/tangle -t1 > using: 1 tasks duration 4.638 ms x 1 = 4.638 > > > gnat-gpl-2016 > > $ ./bin/tangle > using: 8 tasks duration 430 ms x 8 = 3.440 > > $ ./bin/tangle -t4 > using: 4 tasks duration 740 ms x 4 = 2.960 > > $ ./bin/tangle -t2 > using: 2 tasks duration 1.428 ms x 2 = 2.856 > > $ ./bin/tangle -t1 > using: 1 tasks duration 2.835 ms x 1 = 2.835 The numbers indicate that tasking overhead goes up with more tasks, but it also seems that the 2 to 1 ratio holds true. Choices are: stick with the 2016 version, accept the slowdown, or buy an ACT subscription.