From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 13992C07E95 for ; Tue, 13 Jul 2021 17:36:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EBD2A6117A for ; Tue, 13 Jul 2021 17:36:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233603AbhGMRjZ (ORCPT ); Tue, 13 Jul 2021 13:39:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59610 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232455AbhGMRjZ (ORCPT ); Tue, 13 Jul 2021 13:39:25 -0400 Received: from mail-oi1-x234.google.com (mail-oi1-x234.google.com [IPv6:2607:f8b0:4864:20::234]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C5E39C0613DD for ; Tue, 13 Jul 2021 10:36:34 -0700 (PDT) Received: by mail-oi1-x234.google.com with SMTP id q16so15282180oiw.6 for ; Tue, 13 Jul 2021 10:36:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=wOBUTzDU34OeqzyPEKf4eSACqjnaNmkkXMg8JtzRBIY=; b=Ok2OjjSG6Ot+iZr+xXAS9wKWlVx1ezJQpMlEnWFzMu+BDy3eaQ2Ycz9ihsLBqCuEoF 9y/bZyS+q3qoOMlja4vXAH9gzG+ukx8QfEo9h9LtDka9luMpzgCN2c00SgMQhzWdaeGQ fJFZt5oh7h2Kn4PjBn2sXccdfYnbeluE9g8aaRVPNe6Qf8cCrWLuWl50Aw9fVT9ttFY6 82Fw8dqFt75fV/0039BlY6Scu8mCV8ptuAjvi4MTEsv3pkVZCwqp9jXdQuz+qSWA3aJe Ci0K/5IKj/kn8aK6ZpKvEUWaD8zGDzy43ipH03ff3U/SJuExDbTgucZfeLOeW0txr9CB w+hw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=wOBUTzDU34OeqzyPEKf4eSACqjnaNmkkXMg8JtzRBIY=; b=ZJvCNXVjzB5jaWWPAB7b8POO28+JjYkRRyacPwotCURk/X++2fFa62stVpe0OmVfK2 cT7TvBzq4C98hOysU7tI8xGBB8acSpPSBzcMp4/Gwowddp38eGqBmYaVaCBkxkEn6mZ+ mIkuZjf2ZtBoy7xiKRih7eU6PrElcADBkUaX0gedyTUgifOpn1FUYbSUe/m5lyiULn9a u9hhZqXZqxW/5rHkU3AxAANo26lIPyRqDM4ZgPWU6/eTl57lsSLp/i91DMV36vaoSJu5 h2GSaNzBWGIUROtMr8+73Bb378GMWsy47gL64S8tzKtyZ0ueR6RdS1/6fVsZE1S6B+g+ cArA== X-Gm-Message-State: AOAM533MWtk051DtwfzULG+KwghX5f8PCxFA5dDOBLPsiKZzKMOxfrKq U/2mZGs1Ln8CVyJxIx+0zIK3B7wNgDwsfOgP500= X-Google-Smtp-Source: ABdhPJyD/24j/bOEvx1oB1hmD1AeuerYm3dqEM4iwSmN3SMRkIw0tUE9pzMPvnXWiyIGnMB9oR/jZpUGpcTOu+qt9fE= X-Received: by 2002:aca:acc5:: with SMTP id v188mr360086oie.167.1626197794122; Tue, 13 Jul 2021 10:36:34 -0700 (PDT) MIME-Version: 1.0 References: <87h7hdbpgb.fsf@evledraar.gmail.com> In-Reply-To: From: Elijah Newren Date: Tue, 13 Jul 2021 10:36:23 -0700 Message-ID: Subject: Re: [PATCH v3 24/34] t/perf/p7519: speed up test using "test-tool touch" To: Jeff Hostetler Cc: =?UTF-8?B?w4Z2YXIgQXJuZmrDtnLDsCBCamFybWFzb24=?= , Jeff Hostetler via GitGitGadget , Git Mailing List , Johannes Schindelin , Derrick Stolee , Jeff Hostetler Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org On Tue, Jul 13, 2021 at 10:10 AM Jeff Hostetler wro= te: > > On 7/1/21 7:09 PM, =C3=86var Arnfj=C3=B6r=C3=B0 Bjarmason wrote: > > > > Did you try to replace this with some variant of: > > > > test_seq 1 10000 | xargs touch > > > > Which (depending on your xargs version) would invoke "touch" commands > > with however many argv items it thinks you can handle. > > a quick test on my Windows machine shows that > > test_seq 1 10000 | xargs touch > > takes 3.1 seconds. > > just a simple > > test_seq 1 10000 >/dev/null > > take 0.2 seconds. > > using my test-tool helper cuts that time in half. Yeah, test_seq is pretty bad; it's just a loop in shell. Is there a 'seq' on windows, and does using it instead of test_seq make things faster with =C3=86var's suggested command? I'd really like to modify test_seq to use seq when it's available and fall back to the looping-in-shell when we need to for various platforms. Maybe it'd even make sense to write a 'test-tool seq' and make test_seq use that just so we can rip out that super lame shell looping.