From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,HTML_MESSAGE,MAILING_LIST_MULTI autolearn=ham autolearn_force=no version=3.4.4 Received: from minnie.tuhs.org (minnie.tuhs.org [50.116.15.146]) by inbox.vuxu.org (Postfix) with ESMTP id AA78821382 for ; Wed, 12 Mar 2025 13:41:59 +0100 (CET) Received: from minnie.tuhs.org (localhost [IPv6:::1]) by minnie.tuhs.org (Postfix) with ESMTP id 8523F444E3; Wed, 12 Mar 2025 22:41:54 +1000 (AEST) Received: from mail-ua1-x931.google.com (mail-ua1-x931.google.com [IPv6:2607:f8b0:4864:20::931]) by minnie.tuhs.org (Postfix) with ESMTPS id DC8FB4438B for ; Wed, 12 Mar 2025 22:41:48 +1000 (AEST) Received: by mail-ua1-x931.google.com with SMTP id a1e0cc1a2514c-86b9d1f7249so5056792241.2 for ; Wed, 12 Mar 2025 05:41:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dartmouth.edu; s=google1; t=1741783308; x=1742388108; darn=tuhs.org; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=qYdvd5gd6fJE6zs2aCPX2j29gJZkfSZLwx2mRpH8QsU=; b=SUuRPKfswZ9Mv8sYETjbdI4w6HYhBTBA60ME4Vu9fvmJpzYfnqQsEj/R9r+yBTYN7V CIg1RRowCmztq18fEQWjYCZNeUZt6YE6LySdWsCEDRm38CQZ+E9GMYAbNR65DRGtDRlg pbl49IsQkFrz1EhizA2cqrDOUHmbJ3kFYiNCY+/0Y+T4Wn6M9qkcxOIHJK9wtd5tGfcv 03cUiRAwCoeNmRFntGJ16KzhzqiHfZTDK4+FvQMYSdkgi7l91VeqEDlL2EYkOuppTI/F VpFupA/3arKCrJPoqw5rW5nUO/HIzP2ey+cG29O5c9xUPaj6EjEHS6ejyIIdJB8doNDT G9TA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1741783308; x=1742388108; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=qYdvd5gd6fJE6zs2aCPX2j29gJZkfSZLwx2mRpH8QsU=; b=Y7C8V34yfhlvhSTK2fP5pG/aopuH3Mrls4wcO1JYOm7VKHiaWJkvCnXBDROBVpjQhE xrLZ2ZejWWSIMm4ukm1DcXadkyLObV8dYn11og++IuCtN7JVAVEptRwqtO+1UYBb1iUV awJUAX1qIGmSGgdm7wt1wPqQeSxIsGet7utiCSujPU6cFcAhMauxGdJEaeKCdYl7UWq0 A6VcwP7pqRHygJHVZSckYZOfbwcio3jRMWRCqoAWeFvugD9lgPhI4k9JY7rSxCDHuILD xg24XnMnlGTWNXrtTGNlcf+xnutSaT/diiJqTeRW+q5r530/zV+OxvplC5OhdhkMF7wf QDVw== X-Gm-Message-State: AOJu0YyN+X6Q1rD8Ti4mHpT1IalFHDCgm116p8X5ucA34DdLr7/Xn2UH knV/LiBdkLosszLZ7YXVxWwLGllYyNPGeYk8qsv7UKH3OvK3+5ltIxjeFhYHFBL00kq/TN786T7 rJmzm/NoP2CnPmKg1HDxkM7hFaJVvS0NaNWycKA== X-Gm-Gg: ASbGnct3JrN0s2LJyjACvRN1Oa9q+zNvuIV3uXOCCN/I29w6x9njq+zUCQqDGrFoujo 854idzdTnbcW7UJa8Db3sLB/d35tbUpuc14X2tnR7ymlAdi5zAwym5W54WdUdCtHpaagFAdQFmu YTXevvweG+1wEMDqIDH5hDbKzhPDM= X-Google-Smtp-Source: AGHT+IFq+c3NuFrgEhbbdKUmqIllJeq5CSfzV3V9FBNUOD2Ft3Bx5vQxRncaoTNuiqdRFz7TwGiIM2FqnxvOb6GVp/Q= X-Received: by 2002:a05:6102:3908:b0:4bb:de88:d027 with SMTP id ada2fe7eead31-4c34d23a4bbmr6112030137.7.1741783307974; Wed, 12 Mar 2025 05:41:47 -0700 (PDT) MIME-Version: 1.0 References: <2152f633-b9c0-43a7-953e-3a4260b98b77@app.fastmail.com> In-Reply-To: <2152f633-b9c0-43a7-953e-3a4260b98b77@app.fastmail.com> From: Douglas McIlroy Date: Wed, 12 Mar 2025 08:41:31 -0400 X-Gm-Features: AQ5f1Jofur7w3LlIuwJ7-TkkZ2QdFMHSQ6obOGnzGuG-c0MuJsyILLzEVdfsyOc Message-ID: To: Jeff Johnson Content-Type: multipart/alternative; boundary="000000000000590cf006302487a7" Message-ID-Hash: CFYYZEF5P37UWID4PTQSNW57JMDESCV6 X-Message-ID-Hash: CFYYZEF5P37UWID4PTQSNW57JMDESCV6 X-MailFrom: douglas.mcilroy@dartmouth.edu X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-tuhs.tuhs.org-0; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: TUHS X-Mailman-Version: 3.3.6b1 Precedence: list Subject: [TUHS] Re: "Webster's Second on the Head of a Pin"? List-Id: The Unix Heritage Society mailing list Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: --000000000000590cf006302487a7 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Thanks for the advice. I somehow had inferred from the man page that 512M was the default. In any event, it doesn't move the needle on compression ratio. Doug On Tue, Mar 11, 2025 at 10:47=E2=80=AFAM Jeff Johnson wro= te: > As far as getting maximum compression from lzip, `lzip -9 -s 512Mi` > is usually the preferred invocation. I think the default dictionary > size at -9 is 64MiB, but that's not that relevant I guess, unless > we are comparing different methods and trying to see about what > ratios different algorithms get at similar memory usage. > > -- > Jeffrey H. Johnson > trnsz@pobox.com > > On Mon, Mar 10, 2025, at 8:23 PM, Douglas McIlroy wrote: > > Gnu lzip -9 got a 3.92 compression factor , while Morris-Thompson got > 4.52. > > -- > Jeffrey H. Johnson > trnsz@pobox.com > > On Mon, Mar 10, 2025, at 8:23 PM, Douglas McIlroy wrote: > > Gnu lzip -9 got a 3.92 compression factor , while Morris-Thompson got > 4.52. > --000000000000590cf006302487a7 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Thanks for the advice. I somehow had inferred from the man= page that 512M was the default. In any event, it doesn't move the need= le on compression ratio.

Doug

On Tue, Mar 11, 2025 at 10:47=E2=80=AFAM Jeff Johnson <trnsz@pobox.com> wrote:
As far as getting maximum compression fr= om lzip, `lzip -9 -s 512Mi`
is usually the preferred invocation.=C2=A0 I think the default dictionary size at -9 is 64MiB, but that's not that relevant I guess, unless
we are comparing different methods and trying to see about what
ratios different algorithms get at similar memory usage.=C2=A0

--
Jeffrey H. Johnson
trnsz@pobox.com
On Mon, Mar 10, 2025, at 8:23 PM, Douglas McIlroy wrote:
> Gnu lzip -9=C2=A0 got a 3.92 compression factor , while Morris-Thompso= n got 4.52.

--
Jeffrey H. Johnson
trnsz@pobox.com
On Mon, Mar 10, 2025, at 8:23 PM, Douglas McIlroy wrote:
> Gnu lzip -9=C2=A0 got a 3.92 compression factor , while Morris-Thompso= n got 4.52.
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