[bitcoin-dev] Compact Block Relay BIP

Matt Corallo lf-lists at mattcorallo.com
Fri May 6 03:09:14 UTC 2016


Thanks Greg for the testing!

Note that to those who are reviewing the doc, a few minor tweaks to
wording and clarification have been made to the git version, so please
review there.

On 05/03/16 05:02, Gregory Maxwell wrote:
> On Mon, May 2, 2016 at 10:13 PM, Matt Corallo via bitcoin-dev
> <bitcoin-dev at lists.linuxfoundation.org> wrote:
>> Hi all,
>>
>> The following is a BIP-formatted design spec for compact block relay
>> designed to limit on wire bytes during block relay. You can find the
>> latest version of this document at
>> https://github.com/TheBlueMatt/bips/blob/master/bip-TODO.mediawiki.
> 
> Thanks Matt!
> 
> I've been testing this for a couple weeks (in various forms).  I've
> been getting over 96% reduction in block-bytes sent. I don't have a
> good metric for it, but bandwidth spikes are greatly reduced. The
> largest blocktxn message I've seen on a node that has been up for at
> least a day is 475736 bytes. 94% of the blocks less than 100kb must be
> sent in total.
> 
> In the opportunistic mode my measurements are showing 73% of blocks
> transferred with 0.5 RTT even without prediction, 87% if up to 4
> additional transactions are predicted, and 91% for 30 transactions (my
> rough estimate for the 10k maximum prediction suggested in the BIP.
> 


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