1  // Copyright (c) 2024- 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  #include <random.h>
 7  #include <stddef.h>
 8  #include <util/strencodings.h>
 9  #include <cassert>
10  #include <optional>
11  #include <vector>
12  
13  std::string generateHexString(size_t length) {
14      const auto hex_digits = "0123456789ABCDEF";
15      FastRandomContext rng(/*fDeterministic=*/true);
16  
17      std::string data;
18      while (data.size() < length) {
19          auto digit = hex_digits[rng.randbits(4)];
20          data.push_back(digit);
21      }
22      return data;
23  }
24  
25  static void HexParse(benchmark::Bench& bench)
26  {
27      auto data = generateHexString(130); // Generates 678B0EDA0A1FD30904D5A65E3568DB82DB2D918B0AD8DEA18A63FECCB877D07CAD1495C7157584D877420EF38B8DA473A6348B4F51811AC13C786B962BEE5668F9 by default
28  
29      bench.batch(data.size()).unit("base16").run([&] {
30          auto result = TryParseHex(data);
31          assert(result != std::nullopt); // make sure we're measuring the successful case
32          ankerl::nanobench::doNotOptimizeAway(result);
33      });
34  }
35  
36  BENCHMARK(HexParse, benchmark::PriorityLevel::HIGH);