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e6430b2773
`setup()` in nanobench runs once per epoch, not once per timed call. If an epoch executes the benchmark body multiple times, `setup()` can silently leave later iterations with different preconditions. Make `setup()` force `epochIterations(1)` itself: keep rejecting incompatible larger explicit epoch sizes, but allow existing single-iteration callers such as `-sanity-check`. With `setup()` handling this centrally, remove the redundant `epochIterations(1)` calls from the benchmarks that use it. Co-authored-by: David Gumberg <davidzgumberg@gmail.com>
32 lines
962 B
C++
32 lines
962 B
C++
// Copyright (c) 2023-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 <streams.h>
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#include <test/util/setup_common.h>
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#include <util/fs.h>
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#include <cstddef>
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#include <cstdint>
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#include <cstdio>
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static void FindByte(benchmark::Bench& bench)
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{
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const auto testing_setup{MakeNoLogFileContext<const BasicTestingSetup>(ChainType::REGTEST)};
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AutoFile file{fsbridge::fopen(testing_setup->m_path_root / "streams_tmp", "w+b")};
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const size_t file_size = 200;
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uint8_t data[file_size] = {0};
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data[file_size - 1] = 1;
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file << data;
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file.seek(0, SEEK_SET);
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BufferedFile bf{file, /*nBufSize=*/file_size + 1, /*nRewindIn=*/file_size};
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bench.setup([&] { bf.SetPos(0); })
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.run([&] { bf.FindByte(std::byte(1)); });
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assert(file.fclose() == 0);
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}
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BENCHMARK(FindByte);
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