mirror of https://github.com/bitcoin/bitcoin
89 lines
3.4 KiB
C++
89 lines
3.4 KiB
C++
// Copyright (c) 2016-2019 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/bench.h>
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#include <coins.h>
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#include <policy/policy.h>
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#include <script/signingprovider.h>
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#include <vector>
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// FIXME: Dedup with SetupDummyInputs in test/transaction_tests.cpp.
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//
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// Helper: create two dummy transactions, each with
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// two outputs. The first has 11 and 50 COIN outputs
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// paid to a TX_PUBKEY, the second 21 and 22 COIN outputs
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// paid to a TX_PUBKEYHASH.
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//
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static std::vector<CMutableTransaction>
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SetupDummyInputs(FillableSigningProvider& keystoreRet, CCoinsViewCache& coinsRet)
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{
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std::vector<CMutableTransaction> dummyTransactions;
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dummyTransactions.resize(2);
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// Add some keys to the keystore:
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CKey key[4];
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for (int i = 0; i < 4; i++) {
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key[i].MakeNewKey(i % 2);
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keystoreRet.AddKey(key[i]);
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}
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// Create some dummy input transactions
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dummyTransactions[0].vout.resize(2);
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dummyTransactions[0].vout[0].nValue = 11 * COIN;
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dummyTransactions[0].vout[0].scriptPubKey << ToByteVector(key[0].GetPubKey()) << OP_CHECKSIG;
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dummyTransactions[0].vout[1].nValue = 50 * COIN;
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dummyTransactions[0].vout[1].scriptPubKey << ToByteVector(key[1].GetPubKey()) << OP_CHECKSIG;
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AddCoins(coinsRet, CTransaction(dummyTransactions[0]), 0);
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dummyTransactions[1].vout.resize(2);
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dummyTransactions[1].vout[0].nValue = 21 * COIN;
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dummyTransactions[1].vout[0].scriptPubKey = GetScriptForDestination(PKHash(key[2].GetPubKey()));
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dummyTransactions[1].vout[1].nValue = 22 * COIN;
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dummyTransactions[1].vout[1].scriptPubKey = GetScriptForDestination(PKHash(key[3].GetPubKey()));
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AddCoins(coinsRet, CTransaction(dummyTransactions[1]), 0);
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return dummyTransactions;
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}
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// Microbenchmark for simple accesses to a CCoinsViewCache database. Note from
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// laanwj, "replicating the actual usage patterns of the client is hard though,
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// many times micro-benchmarks of the database showed completely different
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// characteristics than e.g. reindex timings. But that's not a requirement of
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// every benchmark."
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// (https://github.com/bitcoin/bitcoin/issues/7883#issuecomment-224807484)
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static void CCoinsCaching(benchmark::State& state)
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{
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FillableSigningProvider keystore;
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CCoinsView coinsDummy;
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CCoinsViewCache coins(&coinsDummy);
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std::vector<CMutableTransaction> dummyTransactions = SetupDummyInputs(keystore, coins);
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CMutableTransaction t1;
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t1.vin.resize(3);
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t1.vin[0].prevout.hash = dummyTransactions[0].GetHash();
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t1.vin[0].prevout.n = 1;
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t1.vin[0].scriptSig << std::vector<unsigned char>(65, 0);
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t1.vin[1].prevout.hash = dummyTransactions[1].GetHash();
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t1.vin[1].prevout.n = 0;
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t1.vin[1].scriptSig << std::vector<unsigned char>(65, 0) << std::vector<unsigned char>(33, 4);
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t1.vin[2].prevout.hash = dummyTransactions[1].GetHash();
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t1.vin[2].prevout.n = 1;
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t1.vin[2].scriptSig << std::vector<unsigned char>(65, 0) << std::vector<unsigned char>(33, 4);
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t1.vout.resize(2);
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t1.vout[0].nValue = 90 * COIN;
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t1.vout[0].scriptPubKey << OP_1;
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// Benchmark.
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const CTransaction tx_1(t1);
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while (state.KeepRunning()) {
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bool success = AreInputsStandard(tx_1, coins);
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assert(success);
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CAmount value = coins.GetValueIn(tx_1);
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assert(value == (50 + 21 + 22) * COIN);
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}
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}
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BENCHMARK(CCoinsCaching, 170 * 1000);
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