1  // Copyright (c) 2016-present The Bitcoin Core developers
 2  // Distributed under the MIT software license, see the accompanying
 3  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 4  
 5  #include <bench/bench.h>
 6  #include <coins.h>
 7  #include <consensus/amount.h>
 8  #include <key.h>
 9  #include <policy/policy.h>
10  #include <primitives/transaction.h>
11  #include <script/script.h>
12  #include <script/signingprovider.h>
13  #include <test/util/transaction_utils.h>
14  
15  #include <cassert>
16  #include <vector>
17  
18  // Microbenchmark for simple accesses to a CCoinsViewCache database. Note from
19  // laanwj, "replicating the actual usage patterns of the client is hard though,
20  // many times micro-benchmarks of the database showed completely different
21  // characteristics than e.g. reindex timings. But that's not a requirement of
22  // every benchmark."
23  // (https://github.com/bitcoin/bitcoin/issues/7883#issuecomment-224807484)
24  static void CCoinsCaching(benchmark::Bench& bench)
25  {
26      ECC_Context ecc_context{};
27  
28      FillableSigningProvider keystore;
29      CCoinsViewCache coins{&CoinsViewEmpty::Get()};
30      std::vector<CMutableTransaction> dummyTransactions =
31          SetupDummyInputs(keystore, coins, {11 * COIN, 50 * COIN, 21 * COIN, 22 * COIN});
32  
33      CMutableTransaction t1;
34      t1.vin.resize(3);
35      t1.vin[0].prevout.hash = dummyTransactions[0].GetHash();
36      t1.vin[0].prevout.n = 1;
37      t1.vin[0].scriptSig << std::vector<unsigned char>(65, 0);
38      t1.vin[1].prevout.hash = dummyTransactions[1].GetHash();
39      t1.vin[1].prevout.n = 0;
40      t1.vin[1].scriptSig << std::vector<unsigned char>(65, 0) << std::vector<unsigned char>(33, 4);
41      t1.vin[2].prevout.hash = dummyTransactions[1].GetHash();
42      t1.vin[2].prevout.n = 1;
43      t1.vin[2].scriptSig << std::vector<unsigned char>(65, 0) << std::vector<unsigned char>(33, 4);
44      t1.vout.resize(2);
45      t1.vout[0].nValue = 90 * COIN;
46      t1.vout[0].scriptPubKey << OP_1;
47  
48      // Benchmark.
49      const CTransaction tx_1(t1);
50      bench.run([&] {
51          assert(ValidateInputsStandardness(tx_1, coins).IsValid());
52      });
53  }
54  
55  BENCHMARK(CCoinsCaching);