Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193] helo=mx.sourceforge.net) by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1XdDMV-0002d8-2f for bitcoin-development@lists.sourceforge.net; Sun, 12 Oct 2014 07:14:39 +0000 Received-SPF: pass (sog-mx-3.v43.ch3.sourceforge.com: domain of gmail.com designates 209.85.213.182 as permitted sender) client-ip=209.85.213.182; envelope-from=gmaxwell@gmail.com; helo=mail-ig0-f182.google.com; Received: from mail-ig0-f182.google.com ([209.85.213.182]) by sog-mx-3.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1XdDMU-0001Lc-5A for bitcoin-development@lists.sourceforge.net; Sun, 12 Oct 2014 07:14:38 +0000 Received: by mail-ig0-f182.google.com with SMTP id hn15so7279641igb.15 for ; Sun, 12 Oct 2014 00:14:32 -0700 (PDT) MIME-Version: 1.0 X-Received: by 10.51.17.66 with SMTP id gc2mr21024251igd.40.1413098072819; Sun, 12 Oct 2014 00:14:32 -0700 (PDT) Received: by 10.107.159.3 with HTTP; Sun, 12 Oct 2014 00:14:32 -0700 (PDT) In-Reply-To: References: Date: Sun, 12 Oct 2014 07:14:32 +0000 Message-ID: From: Gregory Maxwell To: Pieter Wuille Content-Type: text/plain; charset=UTF-8 X-Spam-Score: -1.6 (-) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. -1.5 SPF_CHECK_PASS SPF reports sender host as permitted sender for sender-domain 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (gmaxwell[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-Headers-End: 1XdDMU-0001Lc-5A Cc: Bitcoin Dev Subject: Re: [Bitcoin-development] Request for review/testing: headers-first synchronization in Bitcoin Core X-BeenThere: bitcoin-development@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 12 Oct 2014 07:14:39 -0000 On Sat, Oct 11, 2014 at 11:34 PM, Pieter Wuille wrote: > * Parallel block downloading (much faster sync on typical network connections). "Much faster" is an understatement. Benchmarking here shows one hour five minutes syncing to 295000. Old code isn't even at 250000 after 7 hours. (I'm using 295k as the target here because after that point ecdsa dominates, and then your 6+x faster libsecp256k1 makes more of a difference)