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 2002:a24:6888:: with SMTP id v130-v6mr256842itb.34.1542674866977; Mon, 19 Nov 2018 16:47:46 -0800 (PST) X-Received: by 2002:a9d:5ad:: with SMTP id 42mr309772otd.0.1542674866876; Mon, 19 Nov 2018 16:47:46 -0800 (PST) Path: eternal-september.org!reader01.eternal-september.org!feeder.eternal-september.org!news.gegeweb.eu!gegeweb.org!usenet-fr.net!proxad.net!feeder1-2.proxad.net!209.85.166.215.MISMATCH!z5-v6no721262ite.0!news-out.google.com!v141ni1011ita.0!nntp.google.com!q69no722074itb.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail Newsgroups: comp.lang.ada Date: Mon, 19 Nov 2018 16:47:46 -0800 (PST) In-Reply-To: <0577e947-d691-4b81-aca6-b2e86bbef634@googlegroups.com> Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=146.5.17.97; posting-account=lJ3JNwoAAAAQfH3VV9vttJLkThaxtTfC NNTP-Posting-Host: 146.5.17.97 References: <0577e947-d691-4b81-aca6-b2e86bbef634@googlegroups.com> User-Agent: G2/1.0 MIME-Version: 1.0 Message-ID: <6d09e525-5a25-471c-a889-0d13588d9118@googlegroups.com> Subject: Re: GNAT Modification_Time limitation From: Shark8 Injection-Date: Tue, 20 Nov 2018 00:47:46 +0000 Content-Type: text/plain; charset="UTF-8" Xref: reader01.eternal-september.org comp.lang.ada:54844 Date: 2018-11-19T16:47:46-08:00 List-Id: The problem with using the filesystem timestamp is that its resolution is too coarse compared to the processing-speed of your CPU. I would recommend either implementing some sort of controlled cache, version-control, or 'hacking' the timestamp so that it's a really a build-number (eg Build 1 -> 01 Jan 1900, build 2 -> 02 Jan 1900, build 35 -> 04 Feb 1900, etc).