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txgraph: pass fallback_order to TxGraph (preparation)

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This adds an std::function<strong_ordering(Ref&,Ref&)> argument to the
MakeTxGraph function, which can be used by the caller (e.g., mempool
code) to provide a fallback order to TxGraph.

This is just preparation; TxGraph does not yet use this fallback order
for anything.
This commit is contained in:
Pieter Wuille
2026-01-08 15:17:28 -05:00
parent 941c432a46
commit fba004a3df
7 changed files with 100 additions and 23 deletions
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7
src/bench/txgraph.cpp
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@@ -12,6 +12,11 @@
namespace {
std::strong_ordering PointerComparator(const TxGraph::Ref& a, const TxGraph::Ref& b) noexcept
{
return (&a) <=> (&b);
}
void BenchTxGraphTrim(benchmark::Bench& bench)
{
// The from-block transactions consist of 1000 fully linear clusters, each with 64
@@ -60,7 +65,7 @@ void BenchTxGraphTrim(benchmark::Bench& bench)
std::vector<size_t> top_components;
InsecureRandomContext rng(11);
auto graph = MakeTxGraph(MAX_CLUSTER_COUNT, MAX_CLUSTER_SIZE, NUM_ACCEPTABLE_ITERS);
auto graph = MakeTxGraph(MAX_CLUSTER_COUNT, MAX_CLUSTER_SIZE, NUM_ACCEPTABLE_ITERS, PointerComparator);
// Construct the top chains.
for (int chain = 0; chain < NUM_TOP_CHAINS; ++chain) {