From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-3.7 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, FROM_EXCESS_BASE64,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI,SPF_HELO_NONE,SPF_NONE shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id EF1DC1F461 for ; Tue, 27 Aug 2019 08:41:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729041AbfH0IlR (ORCPT ); Tue, 27 Aug 2019 04:41:17 -0400 Received: from mail-wm1-f65.google.com ([209.85.128.65]:35453 "EHLO mail-wm1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726527AbfH0IlR (ORCPT ); Tue, 27 Aug 2019 04:41:17 -0400 Received: by mail-wm1-f65.google.com with SMTP id l2so2097022wmg.0 for ; Tue, 27 Aug 2019 01:41:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:content-transfer-encoding:in-reply-to :user-agent; bh=pV1ImUkNHAHQRiaq2yJH+8IZY7CrDGul3EKjAQsJ4TI=; b=Va+qoaCh4FzIVKpQQbZK0HNxhlNwCMv+SzjAxuRF2guPMZtS7Rbu/Qp18rUdrJyAfh 5T62j8lQcJmz8GXEOLwkmpWCILaikmOakcW1RA9UyYtbJf2M8YzNE2RlVUG9JKyBqt8g 2rRiFGs6IxdpktW4+dHbD0BNDQDcIi71KiqD9T39DE7XV2z3TNwWJ3MTj5Xdc1w0cVCN x0h+KMiK8mPeAmaUE7PrybDOtj5cg2HigJmk/4MQwe7wcwD0gv6ifKbQulSvA04Vumyt NvqD88O+1CyCxRSjw/vXP0E7ChGQ4HpMr/e/IZzoMcmqKNSNoTTdC5J7hGsO+h1w/jpq c6sA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:content-transfer-encoding :in-reply-to:user-agent; bh=pV1ImUkNHAHQRiaq2yJH+8IZY7CrDGul3EKjAQsJ4TI=; b=ILiSbw9OC9yug73SDk1J/R2NiRKWJNwNZMeMUFyptG1mwevxLWFEfI1R9x0G2VT8Qu v0K1RFWHI/jeZHoptgWH6rAzMwacv0N90lYE2vDaApbBZV2TDQQO7uJkvG3/TQF4FFO+ nPRN7NoDiCWVAEYiSyHySfnrVcsNeyRU6noVQPJhqBmDCTAV5qdCf0Ka30TzncpnQePu qXPzpVTwr82YTjcxtH7NU+wfIBfKYRr6qO0I8vjEtG6iLJRKSrviePbkcVTpOdJxGm6Y SnLnEHhmmesXQA6qdXniX71XE7BbE518utCqqodkMO8l7s7S69UyIPHhvnrmMj8LCWLP RM1w== X-Gm-Message-State: APjAAAWLe18RKkrAHhrBjEPGLUGVV66LxhNIM6DL53HNyU6ilqRyIs/n sIIn7CsNv5XfbYuy62iVGiQBCBXHLTI= X-Google-Smtp-Source: APXvYqxY09Xw8XyKvgbjCEnoqyCyflBtXgckkth7S4vsSkbuZLjzeiQZvz6Tnf5gLOmIeTkqZ3biVA== X-Received: by 2002:a7b:cb8e:: with SMTP id m14mr18746735wmi.10.1566895274870; Tue, 27 Aug 2019 01:41:14 -0700 (PDT) Received: from szeder.dev (x4db46f61.dyn.telefonica.de. [77.180.111.97]) by smtp.gmail.com with ESMTPSA id o14sm25174462wrg.64.2019.08.27.01.41.13 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 27 Aug 2019 01:41:13 -0700 (PDT) Date: Tue, 27 Aug 2019 10:41:11 +0200 From: SZEDER =?utf-8?B?R8OhYm9y?= To: Uwe =?utf-8?Q?Kleine-K=C3=B6nig?= Cc: git@vger.kernel.org, entwicklung@pengutronix.de Subject: Re: git slow unless piped to cat Message-ID: <20190827084111.GU20404@szeder.dev> References: <20190827081559.mt5wjpdvqzn62dib@pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20190827081559.mt5wjpdvqzn62dib@pengutronix.de> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org On Tue, Aug 27, 2019 at 10:15:59AM +0200, Uwe Kleine-König wrote: > I have a problem here with git being slow in some situations. > Using git 2.23.0 (from Debian) the effect is: > > ukl@dude.ptx:/ptx/src/git/linux.git$ sudo sh -c "echo 3 > /proc/sys/vm/drop_caches"; time git show v5.2 > tag v5.2 > ... > > real 0m12.727s > user 0m0.300s > sys 0m0.371s > > But to get the actual data isn't the problem: > > ukl@dude.ptx:/ptx/src/git/linux.git$ sudo sh -c "echo 3 > /proc/sys/vm/drop_caches"; time git show v5.2 | cat > tag v5.2 > ... > > real 0m0.764s > user 0m0.014s > sys 0m0.020s > How does 'git --no-pager show v5.2' perform? If it's as fast as the case piping the output to cat, then look into what pager and pager options you use.