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073e28b1e9
Single byte writes are used very often (used for every (u)int8_t or std::byte or bool and for every VarInt's first byte which is also needed for every (pre)Vector). It makes sense to avoid the generalized serialization infrastructure that isn't needed: * AutoFile write doesn't need to allocate 4k buffer for a single byte now; * `VectorWriter` and `DataStream` avoids memcpy/insert calls. > cmake -B build -DBUILD_BENCH=ON -DCMAKE_BUILD_TYPE=Release && cmake --build build -j$(nproc) && build/bin/bench_bitcoin -filter='SizeComputerBlock|SerializeBlock' --min-time=10000 > C compiler ............................ AppleClang 16.0.0.16000026 | ns/block | block/s | err% | total | benchmark |--------------------:|--------------------:|--------:|----------:|:---------- | 174,569.19 | 5,728.39 | 0.6% | 10.89 | `SerializeBlock` | 10,241.16 | 97,645.21 | 0.0% | 11.00 | `SizeComputerBlock` > C++ compiler .......................... GNU 13.3.0 | ns/block | block/s | err% | ins/block | cyc/block | IPC | bra/block | miss% | total | benchmark |--------------------:|--------------------:|--------:|----------------:|----------------:|-------:|---------------:|--------:|----------:|:---------- | 615,000.56 | 1,626.01 | 0.0% | 8,015,883.64 | 2,208,340.88 | 3.630 | 1,517,035.62 | 0.5% | 10.56 | `SerializeBlock` | 25,676.76 | 38,945.72 | 0.0% | 159,390.03 | 92,202.10 | 1.729 | 42,131.03 | 0.9% | 11.00 | `SizeComputerBlock`
89 lines
2.9 KiB
C++
89 lines
2.9 KiB
C++
// Copyright (c) 2016-2022 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 <bench/data/block413567.raw.h>
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#include <chainparams.h>
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#include <common/args.h>
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#include <consensus/validation.h>
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#include <primitives/block.h>
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#include <primitives/transaction.h>
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#include <serialize.h>
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#include <span.h>
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#include <streams.h>
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#include <util/chaintype.h>
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#include <validation.h>
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#include <cassert>
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#include <cstddef>
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#include <memory>
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#include <optional>
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#include <vector>
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static void SizeComputerBlock(benchmark::Bench& bench) {
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CBlock block;
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DataStream(benchmark::data::block413567) >> TX_WITH_WITNESS(block);
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bench.unit("block").run([&] {
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SizeComputer size_computer;
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size_computer << TX_WITH_WITNESS(block);
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assert(size_computer.size() == benchmark::data::block413567.size());
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});
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}
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static void SerializeBlock(benchmark::Bench& bench) {
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CBlock block;
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DataStream(benchmark::data::block413567) >> TX_WITH_WITNESS(block);
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// Create output stream and verify first serialization matches input
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bench.unit("block").run([&] {
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DataStream output_stream(benchmark::data::block413567.size());
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output_stream << TX_WITH_WITNESS(block);
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assert(output_stream.size() == benchmark::data::block413567.size());
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});
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}
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// These are the two major time-sinks which happen after we have fully received
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// a block off the wire, but before we can relay the block on to peers using
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// compact block relay.
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static void DeserializeBlock(benchmark::Bench& bench)
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{
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DataStream stream(benchmark::data::block413567);
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std::byte a{0};
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stream.write(std::span{&a, 1}); // Prevent compaction
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bench.unit("block").run([&] {
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CBlock block;
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stream >> TX_WITH_WITNESS(block);
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bool rewound = stream.Rewind(benchmark::data::block413567.size());
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assert(rewound);
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});
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}
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static void DeserializeAndCheckBlock(benchmark::Bench& bench)
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{
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DataStream stream(benchmark::data::block413567);
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std::byte a{0};
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stream.write(std::span{&a, 1}); // Prevent compaction
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ArgsManager bench_args;
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const auto chainParams = CreateChainParams(bench_args, ChainType::MAIN);
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bench.unit("block").run([&] {
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CBlock block; // Note that CBlock caches its checked state, so we need to recreate it here
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stream >> TX_WITH_WITNESS(block);
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bool rewound = stream.Rewind(benchmark::data::block413567.size());
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assert(rewound);
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BlockValidationState validationState;
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bool checked = CheckBlock(block, validationState, chainParams->GetConsensus());
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assert(checked);
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});
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}
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BENCHMARK(SizeComputerBlock, benchmark::PriorityLevel::HIGH);
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BENCHMARK(SerializeBlock, benchmark::PriorityLevel::HIGH);
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BENCHMARK(DeserializeBlock, benchmark::PriorityLevel::HIGH);
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BENCHMARK(DeserializeAndCheckBlock, benchmark::PriorityLevel::HIGH);
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