Bitcoin Core  0.19.99
P2P Digital Currency
merkle_root.cpp
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1 // Copyright (c) 2016-2018 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 
7 #include <uint256.h>
8 #include <random.h>
9 #include <consensus/merkle.h>
10 
11 static void MerkleRoot(benchmark::State& state)
12 {
13  FastRandomContext rng(true);
14  std::vector<uint256> leaves;
15  leaves.resize(9001);
16  for (auto& item : leaves) {
17  item = rng.rand256();
18  }
19  while (state.KeepRunning()) {
20  bool mutation = false;
21  uint256 hash = ComputeMerkleRoot(std::vector<uint256>(leaves), &mutation);
22  leaves[mutation] = hash;
23  }
24 }
25 
26 BENCHMARK(MerkleRoot, 800);
BENCHMARK(MerkleRoot, 800)
uint256 rand256() noexcept
generate a random uint256.
Definition: random.cpp:617
bool KeepRunning()
Definition: bench.h:72
Fast randomness source.
Definition: random.h:106
256-bit opaque blob.
Definition: uint256.h:120
uint256 ComputeMerkleRoot(std::vector< uint256 > hashes, bool *mutated)
Definition: merkle.cpp:45
static void MerkleRoot(benchmark::State &state)
Definition: merkle_root.cpp:11