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b637566c8d
Introduce `CoinsViewEmpty` as an explicit no-op `CCoinsView` implementation, and define its singleton accessor out of line in `coins.cpp` to avoid `-Wunique-object-duplication` in shared-library builds.` Use it at call sites that intentionally want a no-op backend instead of constructing anonymous placeholder views. `CCoinsViewTest` and `CoinsViewBottom` now inherit defaults from `CoinsViewEmpty` (e.g. the unused `EstimateSize()`, which now returns 0). Co-authored-by: Ryan Ofsky <ryan@ofsky.org>
56 lines
2.0 KiB
C++
56 lines
2.0 KiB
C++
// Copyright (c) 2016-present 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 <consensus/amount.h>
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#include <key.h>
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#include <policy/policy.h>
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#include <primitives/transaction.h>
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#include <script/script.h>
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#include <script/signingprovider.h>
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#include <test/util/transaction_utils.h>
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#include <cassert>
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#include <vector>
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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::Bench& bench)
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{
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ECC_Context ecc_context{};
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FillableSigningProvider keystore;
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CCoinsViewCache coins{&CoinsViewEmpty::Get()};
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std::vector<CMutableTransaction> dummyTransactions =
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SetupDummyInputs(keystore, coins, {11 * COIN, 50 * COIN, 21 * COIN, 22 * COIN});
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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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bench.run([&] {
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assert(ValidateInputsStandardness(tx_1, coins).IsValid());
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});
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}
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BENCHMARK(CCoinsCaching);
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