#bitcoin-core-dev on 2023-11-12 — searchable irc log

2023-05-25 14:25 ChanServ changed the topic of #bitcoin-core-dev to: Bitcoin Core development discussion and commit log | Feel free to watch, but please take commentary and usage questions to #bitcoin | Channel logs: http://www.erisian.com.au/bitcoin-core-dev/, http://gnusha.org/bitcoin-core-dev/ | Weekly Meeting Thursday @ 14:00 UTC | Meeting topics http://gnusha.org/bitcoin-core-dev/proposedmeetingtopics.txt

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11:10 <stevenroose> Why is PrecomputedTransactionData not lazy?

11:10 <stevenroose> It's computing all the values whether or not they are needed. It's doing some checks on what execution context there is, but it's still f.e. assuming all txs will do checksigs.

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11:35 <stevenroose> Also, the CScript prevector stack allocation limit is 28, wouldn't that be a lot more efficient if it was 34 right now with segwit?

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11:49 <bitcoin-git> [bitcoin] hebasto opened pull request #28856: depends: Build `capnp` with CMake (master...231112-capnp) https://github.com/bitcoin/bitcoin/pull/28856

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12:59 <sipa> stevenroose: doing it lazily would require synchronization (mutexes/atomics/...), as the values are used from multiple threads simultaneously (all the script validation threads)

13:03 <sipa> re: CScript prevector... yeah, probably time to see if increasing it is already worth it

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13:09 <stevenroose> sipa: ooooooh

13:09 <stevenroose> uff

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13:10 <stevenroose> that's intense, I'm not accounting for that while implementing TXHASH.. maybe a single mutex on the txhash cache structure would be sufficient..

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13:48 <fanquake> stevenroose: want to open an issue re prevector

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13:56 <stevenroose> fanquake: depends.. :D I can make an issue to suggest it, but I don't think I can generate the experimental data required to make a case for it :)

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13:57 <fanquake> yea, just opening an issue is fine for now. someone might pick it up and play around

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