63 lines
2.0 KiB
C++
63 lines
2.0 KiB
C++
// Copyright (c) 2012-2016 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "bench.h"
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#include "wallet/wallet.h"
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#include <boost/foreach.hpp>
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#include <set>
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using namespace std;
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static void addCoin(const CAmount& nValue, const CWallet& wallet, vector<COutput>& vCoins)
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{
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int nInput = 0;
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static int nextLockTime = 0;
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CMutableTransaction tx;
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tx.nLockTime = nextLockTime++; // so all transactions get different hashes
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tx.vout.resize(nInput + 1);
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tx.vout[nInput].nValue = nValue;
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CWalletTx* wtx = new CWalletTx(&wallet, MakeTransactionRef(std::move(tx)));
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int nAge = 6 * 24;
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COutput output(wtx, nInput, nAge, true, true);
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vCoins.push_back(output);
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}
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// Simple benchmark for wallet coin selection. Note that it maybe be necessary
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// to build up more complicated scenarios in order to get meaningful
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// measurements of performance. From laanwj, "Wallet coin selection is probably
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// the hardest, as you need a wider selection of scenarios, just testing the
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// same one over and over isn't too useful. Generating random isn't useful
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// either for measurements."
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// (https://github.com/bitcoin/bitcoin/issues/7883#issuecomment-224807484)
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static void CoinSelection(benchmark::State& state)
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{
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const CWallet wallet;
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vector<COutput> vCoins;
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LOCK(wallet.cs_wallet);
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while (state.KeepRunning()) {
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// Empty wallet.
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BOOST_FOREACH (COutput output, vCoins)
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delete output.tx;
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vCoins.clear();
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// Add coins.
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for (int i = 0; i < 1000; i++)
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addCoin(1000 * COIN, wallet, vCoins);
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addCoin(3 * COIN, wallet, vCoins);
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set<pair<const CWalletTx*, unsigned int> > setCoinsRet;
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CAmount nValueRet;
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bool success = wallet.SelectCoinsMinConf(1003 * COIN, 1, 6, 0, vCoins, setCoinsRet, nValueRet);
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assert(success);
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assert(nValueRet == 1003 * COIN);
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assert(setCoinsRet.size() == 2);
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}
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}
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BENCHMARK(CoinSelection);
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