--- Log opened Sat Feb 04 00:00:34 2023
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18:15 < bitcoin-git> [bitcoin] Bhaney44 opened pull request #27042: Hub dataset added (master...master) https://github.com/bitcoin/bitcoin/pull/27042
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18:48 < bitcoin-git> [bitcoin] achow101 closed pull request #27042: Hub dataset added (master...master) https://github.com/bitcoin/bitcoin/pull/27042
18:57 < phantomcircuit> achow101: so i definitely think there needs to at least be someway for people to use large filters
18:57 < phantomcircuit> since if you have a wallet with >500k keys the filters are worse than useless with the basic filter parameters
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19:59 < sipa> Given a known about of scriptPubKeys to watch for, can you determine what FP rate of the filter is optimal?
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20:47 < phantomcircuit> sipa: i think it's some function of the non-false positive rate and the relative cost of decoding and scanning a block
20:47 < phantomcircuit> the non-false positive rate is unknowable ahead of time though
20:48 < phantomcircuit> it's also not really a question of optimal time wise as it's a time/space trade off (possibly at some extreme filter size it would be slower, but I doubt it)
20:49 < phantomcircuit> i was actually thinking that saving the raw siphashes might be worth it for people with very large wallets, but if they have lots of transactions they're going to be scanning most of the blocks anyways
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20:51 < phantomcircuit> for the bip157/158 filters there's an optimal size, since there's a single thing you're optimizing for, bandwidth, but with filters on disk it's definitely harder to choose a filter size as it's a time/disk space trade off
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21:14 < phantomcircuit> sipa: that being said on a wallet with 750k keys going from P=32 to P=48 actually cost me 2 minutes, presumably because the decoder is slow
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--- Log closed Sun Feb 05 00:00:35 2023