bench_hashlife_breeder.cc

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/*
                          Aleph_w
 
  Data structures & Algorithms
  version 2.0.0b
  https://github.com/lrleon/Aleph-w
 
  This file is part of Aleph-w library
 
  Copyright (c) 2002-2026 Leandro Rabindranath Leon
*/
 
#include <cstddef>
#include <cstdint>
#include <random>
 
#include <benchmarks/ca/bench_support.H>
#include <tpl_ca_hashlife.H>
 
using namespace Aleph::CA;
using namespace Aleph::CA::Bench;
 
int main()
{
  constexpr std::int64_t soup_side = 256;
  constexpr unsigned advance_log2 = 20;  // 2^20 generations in one exponential jump.
  constexpr std::uint64_t soup_seed = 0xB7EED50FCA000001ull;
  const double generations = static_cast<double>(std::uint64_t{1} << advance_log2);
 
  const Bench_Result result = measure("hashlife_breeder", generations, resolve_repeats(3), [&]
  {
    Hashlife_Engine engine;
    std::mt19937_64 rng(soup_seed);
    std::bernoulli_distribution alive(0.5);
    for (std::int64_t y = 0; y < soup_side; ++y)
      for (std::int64_t x = 0; x < soup_side; ++x)
        if (alive(rng))
          engine.set_alive(x, y);
    engine.advance(advance_log2);
  });
 
  emit_json(result);
  return 0;
}