From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.2 Received: from primenet.com.au (ns1.primenet.com.au [203.24.36.2]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id 6b098764 for ; Sat, 8 Feb 2020 05:55:05 +0000 (UTC) Received: (qmail 2509 invoked by alias); 8 Feb 2020 05:54:56 -0000 Mailing-List: contact zsh-workers-help@zsh.org; run by ezmlm Precedence: bulk X-No-Archive: yes List-Id: Zsh Workers List List-Post: List-Help: List-Unsubscribe: X-Seq: 45398 Received: (qmail 18124 invoked by uid 1010); 8 Feb 2020 05:54:56 -0000 X-Qmail-Scanner-Diagnostics: from mail-lj1-f196.google.com by f.primenet.com.au (envelope-from , uid 7791) with qmail-scanner-2.11 (clamdscan: 0.102.1/25713. spamassassin: 3.4.2. Clear:RC:0(209.85.208.196):SA:0(-1.9/5.0):. Processed in 1.816196 secs); 08 Feb 2020 05:54:56 -0000 X-Envelope-From: schaefer@brasslantern.com X-Qmail-Scanner-Mime-Attachments: | X-Qmail-Scanner-Zip-Files: | Received-SPF: pass (ns1.primenet.com.au: SPF record at _netblocks.google.com designates 209.85.208.196 as permitted sender) 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; bh=B+azWKrESF4uBWIqlmrTCyFV33BpBTYaye/zziqX/pw=; b=ZKoI7yLWfWbFOlZ2EeqMrKRpS6baxUFVad5dSw5Ch/1mPt6S2oM3vNliLGVvUHLpMy 7fCzDL66QVR3FL5O0Y4nJcQMTKdSZjQJUhAJsQql/ctaRqlehmCaRw//6rg6c2Oj6Ukz xchpdplqJ6afPskX1Gjix/M31eKXMYBInihxR98OOFanqRwigPajWeofsAX20Ui6CkVY sk8qH1l+0YDuwcXxRxSchjT6QrjLPTiz7a3KCUbKuNEwpV9rRIlbPyzCQIsib2NzUGeT +/u0AR/XB4+dsoSkCj7K2mjCWi5MJGT8Ox/CP6TC/Uiw1TOeXEVoOHKh5hE5Zk5Xy2m4 5eRA== X-Gm-Message-State: APjAAAXNYwB/U/h/Oj+aUoXMhWvAp5H164IKqvXpP9lwTv6JmyPHO6Wf axHXT7A+XiDbCM4AZMRiBE5t6QxGx/jjxZAXSQPCXQ== X-Google-Smtp-Source: APXvYqxBTiKIz1yRSkTn5ez+7ssH965ZoHc34Va0tyKbgdnK1cfIlQ/vK80xsiIGNcLtECVvb3serzj8sHH3bQl92DE= X-Received: by 2002:a2e:810d:: with SMTP id d13mr1687357ljg.113.1581141258406; Fri, 07 Feb 2020 21:54:18 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Bart Schaefer Date: Fri, 7 Feb 2020 21:54:00 -0800 Message-ID: Subject: Re: [PATCH] readhistfile: avoid thousands of lseek(2) syscalls via ftell() To: Michael Stapelberg Cc: "zsh-workers@zsh.org" Content-Type: text/plain; charset="UTF-8" On Thu, Feb 6, 2020 at 11:48 PM Michael Stapelberg wrote: > > Before this change, zsh startup time was dominated by lseek(2) system calls on > the history file Curious. I would have thought stdio buffering would mask most of the need for lseek()ing by ftell().