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352024-10-26T08:15:12 <laanwj> windows has alway been slightly slower, but 3 times would be worrying
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582024-10-26T13:37:55 <bitcoin-git> [bitcoin] glozow pushed 2 commits to master: https://github.com/bitcoin/bitcoin/compare/25dacae9c7fe...2a52718d734c
592024-10-26T13:37:56 <bitcoin-git> bitcoin/master f32c34d Greg Sanders: functional test: Additional package evaluation coverage
602024-10-26T13:37:56 <bitcoin-git> bitcoin/master 2a52718 glozow: Merge bitcoin/bitcoin#31152: functional test: Additional package evaluatio...
612024-10-26T13:37:57 <bitcoin-git> [bitcoin] glozow merged pull request #31152: functional test: Additional package evaluation coverage (master...2024-10-submitpackage_evict_cpfp_success) https://github.com/bitcoin/bitcoin/pull/31152
622024-10-26T14:05:08 <darosior> It seems it was just the predicted time which was off. Will share his result when he posts it.
632024-10-26T14:08:26 <bitcoin-git> [bitcoin] hebasto opened pull request #31161: cmake: Set top-level target output locations (master...241026-top) https://github.com/bitcoin/bitcoin/pull/31161
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662024-10-26T14:31:50 <laanwj> and it makes sense, bitcoind is optimized for various POSIX platforms, not windows, which is different in many aspects; for example leveldb, doesn't even really support windows by itself; the win32 API backend it uses is something i worked on. also the P2P networking doesn't use any i/o polling primitives optimized for windows. Disk i/o is also slower on a lot of windows machines due to windows defender etc getting in the way. To get any level of
672024-10-26T14:31:50 <laanwj> performance there would need a lot of work. Still, it shouldn't be that slow...
682024-10-26T14:34:33 <laanwj> compiling with MSVC instead of mingw also used to be an improvement in speed, but this was 2013, no idea about now, and we can't use that in deterministic builds anyhow
692024-10-26T14:36:08 <hebasto> MSVC builds lack HW-acceleration for SHA256 -- https://github.com/bitcoin/bitcoin/pull/24773
702024-10-26T14:36:09 <darosior> He did mention MSVC vs mingw and i quickly got out of my depth. :)
712024-10-26T14:36:23 <darosior> What do we use for release builds?
722024-10-26T14:36:29 <hebasto> mingw
732024-10-26T14:36:38 <laanwj> mingw, because that's the only thing we can use in side guix
742024-10-26T14:36:52 <laanwj> well we could use clang that would be something to investigate, many seem to prefer that for windows nowadays
752024-10-26T14:37:08 <hebasto> right
762024-10-26T14:49:04 <darosior> So his bench shows syncing 840k blocks took 9.5h on Linux and 15.3h on Windows.
772024-10-26T14:54:01 <darosior> Another interesting observation he makes is that the rate of transactions validated per seconds slows down across the sync (probably with the size of the chainstate?). From about 60 txs per milliseconds at height 250k, to about 50 at height 450k, 45 at 600k and 25 at 800k. Of course it's an imperfect metric with an imperfect measurement, but the
782024-10-26T14:54:01 <darosior> trend seems real.
792024-10-26T15:06:29 <sipa> as the utxo set grows, the rate of cache misses increases
802024-10-26T15:06:38 <sipa> unless you have $infinity dbcache
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902024-10-26T18:00:49 <achow101> yes, that tracks
912024-10-26T18:00:56 <achow101> easy to see if you use -debug=bench
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1102024-10-26T21:03:54 <jb55> laanwj: very odd... reindex did not fix it
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1142024-10-26T22:02:52 <bitcoin-git> [bitcoin] theStack opened pull request #31163: scripted-diff: get rid of remaining "command" terminology in protocol.{h,cpp} (master...202410-remaining_command_terminology) https://github.com/bitcoin/bitcoin/pull/31163
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1202024-10-26T23:45:46 <bitcoin-git> [gui-qml] jarolrod closed pull request #309: Paint rounded caps at the start and end of the Blockclock dial (main...rounded-dial) https://github.com/bitcoin-core/gui-qml/pull/309
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