Big nodes, big loads and lots of (overdue) optimizations#8677

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rustyrussell wants to merge 34 commits intoElementsProject:masterfrom

rustyrussell:guilt/bkpr-post-migration

Commits on Nov 10, 2025

bookkeeper: fix printing of bad JSON results.
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plugins/sql: remove size limit.
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plugins/sql: print times taken to do list comand, populate table, and create index.
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bookkeeper: no longer read listchannelmoves 1000 entries at a time.
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Revert "bookkeeper: don't flood logs if we have many channelmoves all at once."
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pytest: latency and speed test on large coinmoves.
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lightningd: don't copy hooks array into hook request, simply don't shrink it.
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lightningd: don't loop through all commands every time one finishes.
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common: remove tracing exponential behaviour from large numbers of requests.
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common: avoid allocations for small numbers of traces.
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pytest: increase test_generate_coinmoves to 2M entries.
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lightningd: handle large numbers of command outputs gracefully.
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JSONRPC: use a bigger default buffer.
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lightningd: support "filters" in plugins manifest to restrict when hooks are called.
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lightningd: add support for filters on "rpc_command" hook.
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libplugin: allow plugins to register optional filters for each hook they want.
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xpay: use filtering on rpc_command so we only get called on "pay".
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pyln-client: support hook filters.
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lightningd: allow filtering on custommsg hook too.
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commando, chanbackup: use custommsg hooks.
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common: increase jsonrpc_io buffer size temporarily to aggrevate perf issues.
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common: optimize json parsing.
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ccan: update to get io_loop fairness.
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lightningd: don't process more than 100 commands from a JSONRPC at once.
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lightningd: don't process more than 100 commands from a plugin at once.
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plugins/sql: use modern data style, not globals.
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sql: if we use `dev-sqlfilename`, don't bother syncing it to disk.
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sql: use wait RPC so we don't have to check listchannelmoves/listchainmoves each time.
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lightningd: optimize find_cmd.
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bookkeeper: restore limit on asking for all channelmoves at once.
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sql: limit how many chainmoves/channelmoves entries we ask for at once.
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pytest: increase test_generate_coinmoves to 5M entries.
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pytest: test for 1M JSONRPC calls which don't need transactions.
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db: don't start transactions unless we really need to.
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