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// Copyright (c) 2011-2019 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <bench/bench.h>
#include <policy/policy.h>
#include <txmempool.h>
#include <vector>
static void AddTx(const CTransactionRef& tx, CTxMemPool& pool) EXCLUSIVE_LOCKS_REQUIRED(cs_main, pool.cs)
{
int64_t nTime = 0;
unsigned int nHeight = 1;
bool spendsCoinbase = false;
unsigned int sigOpCost = 4;
LockPoints lp;
pool.addUnchecked(CTxMemPoolEntry(tx, 1000, nTime, nHeight, spendsCoinbase, sigOpCost, lp));
}
struct Available {
CTransactionRef ref;
size_t vin_left{0};
size_t tx_count;
Available(CTransactionRef& ref, size_t tx_count) : ref(ref), tx_count(tx_count){}
};
static void ComplexMemPool(benchmark::State& state)
{
FastRandomContext det_rand{true};
std::vector<Available> available_coins;
std::vector<CTransactionRef> ordered_coins;
// Create some base transactions
size_t tx_counter = 1;
for (auto x = 0; x < 100; ++x) {
CMutableTransaction tx = CMutableTransaction();
tx.vin.resize(1);
tx.vin[0].scriptSig = CScript() << CScriptNum(tx_counter);
tx.vin[0].scriptWitness.stack.push_back(CScriptNum(x).getvch());
tx.vout.resize(det_rand.randrange(10)+2);
for (auto& out : tx.vout) {
out.scriptPubKey = CScript() << CScriptNum(tx_counter) << OP_EQUAL;
out.nValue = 10 * COIN;
}
ordered_coins.emplace_back(MakeTransactionRef(tx));
available_coins.emplace_back(ordered_coins.back(), tx_counter++);
}
for (auto x = 0; x < 800 && !available_coins.empty(); ++x) {
CMutableTransaction tx = CMutableTransaction();
size_t n_ancestors = det_rand.randrange(10)+1;
for (size_t ancestor = 0; ancestor < n_ancestors && !available_coins.empty(); ++ancestor){
size_t idx = det_rand.randrange(available_coins.size());
Available coin = available_coins[idx];
uint256 hash = coin.ref->GetHash();
// biased towards taking just one ancestor, but maybe more
size_t n_to_take = det_rand.randrange(2) == 0 ? 1 : 1+det_rand.randrange(coin.ref->vout.size() - coin.vin_left);
for (size_t i = 0; i < n_to_take; ++i) {
tx.vin.emplace_back();
tx.vin.back().prevout = COutPoint(hash, coin.vin_left++);
tx.vin.back().scriptSig = CScript() << coin.tx_count;
tx.vin.back().scriptWitness.stack.push_back(CScriptNum(coin.tx_count).getvch());
}
if (coin.vin_left == coin.ref->vin.size()) {
coin = available_coins.back();
available_coins.pop_back();
}
tx.vout.resize(det_rand.randrange(10)+2);
for (auto& out : tx.vout) {
out.scriptPubKey = CScript() << CScriptNum(tx_counter) << OP_EQUAL;
out.nValue = 10 * COIN;
}
}
ordered_coins.emplace_back(MakeTransactionRef(tx));
available_coins.emplace_back(ordered_coins.back(), tx_counter++);
}
CTxMemPool pool;
LOCK2(cs_main, pool.cs);
while (state.KeepRunning()) {
for (auto& tx : ordered_coins) {
AddTx(tx, pool);
}
pool.TrimToSize(pool.DynamicMemoryUsage() * 3 / 4);
pool.TrimToSize(GetVirtualTransactionSize(*ordered_coins.front()));
}
}
BENCHMARK(ComplexMemPool, 1);
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