Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] helo=mx.sourceforge.net) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1X8ECf-0000p5-Mr for bitcoin-development@lists.sourceforge.net; Fri, 18 Jul 2014 19:52:25 +0000 Received-SPF: pass (sog-mx-1.v43.ch3.sourceforge.com: domain of gmail.com designates 209.85.219.50 as permitted sender) client-ip=209.85.219.50; envelope-from=keziahw@gmail.com; helo=mail-oa0-f50.google.com; Received: from mail-oa0-f50.google.com ([209.85.219.50]) by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1X8ECe-00031t-Or for bitcoin-development@lists.sourceforge.net; Fri, 18 Jul 2014 19:52:25 +0000 Received: by mail-oa0-f50.google.com with SMTP id g18so4021390oah.23 for ; Fri, 18 Jul 2014 12:52:19 -0700 (PDT) X-Received: by 10.182.85.228 with SMTP id k4mr10043399obz.37.1405713139263; Fri, 18 Jul 2014 12:52:19 -0700 (PDT) MIME-Version: 1.0 Received: by 10.202.98.11 with HTTP; Fri, 18 Jul 2014 12:51:59 -0700 (PDT) In-Reply-To: References: From: Kaz Wesley Date: Fri, 18 Jul 2014 12:51:59 -0700 Message-ID: To: Bitcoin Dev 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 (keziahw[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: 1X8ECe-00031t-Or Subject: Re: [Bitcoin-development] Squashing redundant tx data in blocks on the wire 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: Fri, 18 Jul 2014 19:52:25 -0000 I've updated the gist, and added an additional proposal that I think meshes well: https://gist.github.com/kazcw/43c97d3924326beca87d#ultra-fast-block-validation sparseblocks + UFBV would tighten the new-block process to this (when txes have been received in advance): - receive block (~2kB for 1000 tx) - check whether block contains txes known to belong to conflict-sets, and if so whether more than one tx from a single conflict-set has been included (a few operations on very small sets) - relay block (~2kB) The benefits of these changes only occur when the transactions have been seen in advance, but incentivizing ahead-of-block transaction propogation is a plus, as Jeff mentioned; working on a block without first ensuring peers have its transactions would be very expensive from a miner's point of view.