#bitcoin-wizards on 2016-03-26 — irc logs at freenode.irclog.whitequark.org

2015-10-30 00:53 sipa changed the topic of #bitcoin-wizards to: This channel is for discussing theoretical ideas with regard to cryptocurrencies, not about short-term Bitcoin development | http://bitcoin.ninja/ | This channel is logged. | For logs and more information, visit http://bitcoin.ninja

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08:58 <mesmer> is there a reason we only request headers from a single peer on initial sync?

09:07 <weex> what headers?

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09:09 <mesmer> block headers

09:11 <weex> i think once you have a header, any block heade that goes back to the genesis block, you can find your way to the best chain

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09:15 <mesmer> my apologies, I mean why do we request headers from only a single peer. the topic in question is about the single peer, not why we download headers

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09:24 <weex> i guess that's an opportunity, get several headers to convege more quickly

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09:39 <wumpus> that's not a -wizards question

09:40 <wumpus> but I guess the answer is bandwidth: one peer can give you the information, so why request it from more at a time

09:42 <CodeShark> You could download headers in parallel but you can't check PoW until you can link the subchains

09:42 <wumpus> and I think due to the linear nature of checking validity there's not really a way to exploit parallelism here, at least in a way that would overall (round-trip wise) be more efficient

09:43 <CodeShark> You could - but at significant extra complexity and with relatively little benefit

09:43 <wumpus> hmm possibly. I'm not sure it's worth doing though.

09:43 <wumpus> rgiht.

09:43 <wumpus> it's not exactly a bottleneck

09:44 <wumpus> in any case let's move this to #bitcoin-dev, not -wizards

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