parse_hex.cpp raw

   1  // Copyright (c) 2024-present 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 <util/check.h>
   8  #include <util/strencodings.h>
   9  
  10  #include <cstddef>
  11  #include <optional>
  12  #include <string>
  13  #include <vector>
  14  
  15  std::string generateHexString(size_t length) {
  16      const auto hex_digits = "0123456789ABCDEF";
  17      FastRandomContext rng(/*fDeterministic=*/true);
  18  
  19      std::string data;
  20      while (data.size() < length) {
  21          auto digit = hex_digits[rng.randbits(4)];
  22          data.push_back(digit);
  23      }
  24      return data;
  25  }
  26  
  27  static void HexParse(benchmark::Bench& bench)
  28  {
  29      auto data = generateHexString(130); // Generates 678B0EDA0A1FD30904D5A65E3568DB82DB2D918B0AD8DEA18A63FECCB877D07CAD1495C7157584D877420EF38B8DA473A6348B4F51811AC13C786B962BEE5668F9 by default
  30  
  31      bench.batch(data.size()).unit("base16").run([&] {
  32          auto result = TryParseHex(data);
  33          assert(result != std::nullopt); // make sure we're measuring the successful case
  34          ankerl::nanobench::doNotOptimizeAway(result);
  35      });
  36  }
  37  
  38  BENCHMARK(HexParse);
  39