Misc routing optimization#2803

Merged

TheBlueMatt merged 6 commits intolightningdevkit:mainfrom

TheBlueMatt:2023-12-routing-dist-vec

Jul 17, 2024

Commits on Jul 10, 2024

Cache whether a node is a first-hop target in the per-node state
TheBlueMatt
committed
DRY redundant calls to `$candidate.htlc_minimum_msat()` in routing
TheBlueMatt
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Store source/target `node_counter`s in `DirectionalChannelInfo`
TheBlueMatt
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Somewhat optimize the generic `Features::requires_unknown_bits`
TheBlueMatt
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Consolidate `candidate` access in `add_entry` during routing
TheBlueMatt
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Layout channel info to ensure routing uses cache lines well
TheBlueMatt
committed