On Mon, Nov 9, 2015 at 11:18 AM, Peter Tschipper via bitcoin-dev < bitcoin-dev@lists.linuxfoundation.org> wrote:
> I opened a PR #6973 this morning for Zlib Block Compression for block > relay and at the request of @sipa this should have a BIP associated > with it. The idea is simple, to compress the datastream before > sending, initially for blocks only but it could theoretically be done > for transactions as well. Initial results show an average of 20% block > compression and taking 90 milliseconds for a full block (on a very slow > laptop) to compress. The savings will be mostly in terms of less > bandwidth used, but I would expect there to be a small performance gain > during the transmission of the blocks particularly where network latency > is higher. > The trade-off decisions among bandwidth savings, CPU performance, and latency are local, and I think it shouldn't be assumed that any particular node will want to support it. I recommend that if P2P message compression is implemented, it should be negotiated via the services field at connection time. -- Johnathan Corgan Corgan Labs - SDR Training and Development Services http://corganlabs.com
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