Function CCoinsCaching

src/bench/ccoins_caching.cpp:19–52

Microbenchmark for simple accesses to a CCoinsViewCache database. Note from laanwj, "replicating the actual usage patterns of the client is hard though, many times micro-benchmarks of the database showed completely different characteristics than e.g. reindex timings. But that's not a requirement of every benchmark." (https://github.com/bitcoin/bitcoin/issues/7883#issuecomment-224807484)

// every benchmark."
// (https://github.com/bitcoin/bitcoin/issues/7883#issuecomment-224807484)
static void CCoinsCaching(benchmark::Bench& bench)
{
    const ECCVerifyHandle verify_handle;
    ECC_Start();

    FillableSigningProvider keystore;
    CCoinsView coinsDummy;
    CCoinsViewCache coins(&coinsDummy);
    std::vector<CMutableTransaction> dummyTransactions =
        SetupDummyInputs(keystore, coins, {11 * COIN, 50 * COIN, 21 * COIN, 22 * COIN});

    CMutableTransaction t1;
    t1.vin.resize(3);
    t1.vin[0].prevout.hash = dummyTransactions[0].GetHash();
    t1.vin[0].prevout.n = 1;
    t1.vin[0].scriptSig << std::vector<unsigned char>(65, 0);
    t1.vin[1].prevout.hash = dummyTransactions[1].GetHash();
    t1.vin[1].prevout.n = 0;
    t1.vin[1].scriptSig << std::vector<unsigned char>(65, 0) << std::vector<unsigned char>(33, 4);
    t1.vin[2].prevout.hash = dummyTransactions[1].GetHash();
    t1.vin[2].prevout.n = 1;
    t1.vin[2].scriptSig << std::vector<unsigned char>(65, 0) << std::vector<unsigned char>(33, 4);
    t1.vout.resize(2);
    t1.vout[0].nValue = 90 * COIN;
    t1.vout[0].scriptPubKey << OP_1;

    // Benchmark.
    const CTransaction tx_1(t1);
    bench.run([&] {
        bool success{AreInputsStandard(tx_1, coins)};
        assert(success);
    });
    ECC_Stop();
}

BENCHMARK(CCoinsCaching);