parse_hex.cpp raw

   1  // Copyright (c) 2024- The Limenka 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);
  37