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Merge bitcoin/bitcoin#30396: random: add benchmarks and drop unnecessary Shuffle function

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6ecda04fef random: drop ad-hoc Shuffle in favor of std::shuffle (Pieter Wuille)
da28a26aae bench random: benchmark more functions, and add InsecureRandomContext (Pieter Wuille)
0a9bbc64c1 random bench refactor: move to new bench/random.cpp (Pieter Wuille)

Pull request description:

  This adds benchmarks for various operations on `FastRandomContext` and `InsecureRandomContext`, and then removes the ad-hoc `Shuffle` functions, now that it appears that standard library `std::shuffle` has comparable performance. The other reason for keeping `Shuffle`, namely the fact that libstdc++ used self-move (which debug mode panics on) has been fixed as well (see https://github.com/bitcoin/bitcoin/pull/29625#discussion_r1658344049).

ACKs for top commit:
  achow101:
    ACK 6ecda04fef
  hodlinator:
    ACK 6ecda04fef
  dergoegge:
    Code review ACK 6ecda04fef

Tree-SHA512: 2560b7312410581ff2b9bd0716e0f1558d910b5eadb9544785c972384985ac0f11f72d6b2797cfe2e7eb71fa57c30cffd98cc009cb4ee87a18b1524694211417
This commit is contained in:
Ava Chow
2024-07-09 17:52:47 -04:00
parent c51c694ede 6ecda04fef
commit 10677713ca
16 changed files with 123 additions and 65 deletions
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4
src/net_processing.cpp
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@@ -3339,7 +3339,7 @@ std::optional<PeerManagerImpl::PackageToValidate> PeerManagerImpl::Find1P1CPacka
// Create a random permutation of the indices.
std::vector<size_t> tx_indices(cpfp_candidates_different_peer.size());
std::iota(tx_indices.begin(), tx_indices.end(), 0);
Shuffle(tx_indices.begin(), tx_indices.end(), m_rng);
std::shuffle(tx_indices.begin(), tx_indices.end(), m_rng);
for (const auto index : tx_indices) {
// If we already tried a package and failed for any reason, the combined hash was
@@ -4106,7 +4106,7 @@ void PeerManagerImpl::ProcessMessage(CNode& pfrom, const std::string& msg_type,
const bool rate_limited = !pfrom.HasPermission(NetPermissionFlags::Addr);
uint64_t num_proc = 0;
uint64_t num_rate_limit = 0;
Shuffle(vAddr.begin(), vAddr.end(), m_rng);
std::shuffle(vAddr.begin(), vAddr.end(), m_rng);
for (CAddress& addr : vAddr)
{
if (interruptMsgProc)