From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id DA020902 for ; Mon, 10 Apr 2017 01:45:28 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-yb0-f181.google.com (mail-yb0-f181.google.com [209.85.213.181]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 8C9C11BC for ; Mon, 10 Apr 2017 01:45:28 +0000 (UTC) Received: by mail-yb0-f181.google.com with SMTP id f204so28247801ybc.2 for ; Sun, 09 Apr 2017 18:45:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-transfer-encoding; bh=Grm9bjaNa/ZAZWZb7VDqzwx8qlv9lWJIrOyGkqZpmnM=; b=eS0Hryvl5vI3qf7dUiN8ViJYqoa53LFk8mtqXiQoZPfus85mzeQMoboY8e6kF6PI3z j0l/xP9WcF0eJFjnT6YJ/RV9HkQ3MpmOmpAwQIxKyPALXF71C4PLa7S4aAT/rjhg0QJR sewIfm47qS+JdY59P/ldKXS5F8cVnuHLOt4/GyA2O+EA5we5gb9sah5+FhQTEYSFuaEP AD0JLDLwU7Zd5cQGzN8LTcdTGzWBcrK0OuOE/5O7Wq8bE4QDsqoS5jx7NsSBGpw3debk tFnZdVJRvvC8nmIoMAsIX/S+vcmdyG1WijEccu6x8iqsSfTTz8nPDbljPHsKHCJJNQYt cx+A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding; bh=Grm9bjaNa/ZAZWZb7VDqzwx8qlv9lWJIrOyGkqZpmnM=; b=Rz37+AWlFHgydzcndtej5yJsLUYDktuXjskwDLR1kFShFVzq4Ou7YYO0mLgBOjUWf7 EsMdiBFklu8kruLDSg7kH5eiONtrLg+ykhNW7ZqUYTC+MnNQ365YCHcQ+S7d7CJyb20L 5klbaQWl4B/AJZ16HT+FdKr8TcM8PlP8/T1EWR1235bZnpCS7FuK4F21cxgKAZViZ0zy Ov0NCwNotf65eU0Da77k6brogoxZAJWnetOCXPu7BC3E26DrRfoIeeenDn8KQ9NNHT5W A36c0Yo4Eip6UOYBga+nrGFu8li+iYyh4vX6FkWUoBWuMDlG4L301KJLK2TBsxAdixUb 8ucw== X-Gm-Message-State: AFeK/H2/sZFn4mx8LdHM/1LrqOXZ1zHTZD3H6fJ8J1/V0QPhvXElNeHJWXFi+tTARrL/Jw== X-Received: by 10.37.174.15 with SMTP id a15mr24919805ybj.54.1491788727583; Sun, 09 Apr 2017 18:45:27 -0700 (PDT) Received: from [10.0.0.120] (107-202-144-143.lightspeed.sntcca.sbcglobal.net. [107.202.144.143]) by smtp.googlemail.com with ESMTPSA id a144sm5330530ywh.13.2017.04.09.18.45.26 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 09 Apr 2017 18:45:26 -0700 (PDT) To: bitcoin-dev@lists.linuxfoundation.org References: From: Thomas Daede Message-ID: <4d4bca2e-0812-9240-bebf-8b232c599855@gmail.com> Date: Sun, 9 Apr 2017 18:45:24 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, FREEMAIL_FROM, HK_RANDOM_ENVFROM, HK_RANDOM_FROM, RCVD_IN_DNSWL_NONE autolearn=no version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org X-Mailman-Approved-At: Mon, 10 Apr 2017 02:14:54 +0000 Subject: Re: [bitcoin-dev] A Small Modification to Segwit X-BeenThere: bitcoin-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Bitcoin Protocol Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 10 Apr 2017 01:45:29 -0000 On 04/09/2017 05:20 PM, Erik Aronesty via bitcoin-dev wrote: > Have you read the cuckoo cycle paper? Finding cycles in massive graphs > is just about the worst thing to use an ASIC for. It's actually the best thing to use an ASIC tightly coupled with DRAM for - for example, HBM and HBM2 which reduce latency and increase throughput by placing the DRAM on an interposer with the ASIC die, or even putting the logic on the DRAM die itself. It would need at least proof that existing chips using HBM are ideal for Cuckoo Cycle (unlikely) and that no DRAM manufacturer could ever be coaxed into making an ASIC (even harder to guarantee). I think any long term PoW change is irrelevant to the review or adoption of the covert ASICBOOST BIPs, given the many unresolved problems of such a change.