output.txt

nikki@pop-os:~/Development/castle-xyz/castle-client/core
$ ./run.sh release
-- Configuring done
-- Generating done
-- Build files have been written to: /home/nikki/Development/castle-xyz/castle-client/core/build/release
[0/2] Re-checking globbed directories...
[2/2] Linking CXX executable castle-core
time: 1.727592139999615
sum: -1840446080
nikki@pop-os:~/Development/castle-xyz/castle-client/core
$ ./run.sh release
-- Configuring done
-- Generating done
-- Build files have been written to: /home/nikki/Development/castle-xyz/castle-client/core/build/release
[0/2] Re-checking globbed directories...
[2/2] Linking CXX executable castle-core
time: 1.839390456007095
sum: -1840446080
nikki@pop-os:~/Development/castle-xyz/castle-client/core
$

small_vec_benchmark.cpp

#include "precomp.h"

#include "engine.h"


// Run the main loop, calling `frame` per frame. `frame` should return a
// boolean that is `false` when it wants to quit. Handles both the web and
// desktop cases.
template<typename F>
void loop(F &&frame) {
#ifdef __EMSCRIPTEN__
  static auto &sFrame = frame;
  emscripten_set_main_loop(
      []() {
        sFrame();
      },
      0, true);
#else
  while (frame()) {
  }
#endif
}

// Main web and desktop entrypoint
#undef main // SDL does some weird stuff overriding `main` with a macro...
int main() {
  Lv lv { 800, 450 };

  love::RandomGenerator rng;
  auto sum = 0;

  auto start = lv.timer.getTime();
  {
    struct Thing {
      struct Stuff {
        int i = 0;
        float f = 0;
      };
      std::vector<Stuff> stuffs;
    };

    for (auto i = 0; i < 1000; ++i) {
      std::array<Thing, 2000> things;
      for (auto &thing : things) {
        for (auto i = 0; i < int(rng.rand() % 8); ++i) {
          thing.stuffs.push_back(Thing::Stuff { int(rng.rand() % 200), float(rng.random()) });
        }
      }
      for (auto i = 0; i < 100; ++i) {
        for (auto &thing : things) {
          for (auto &stuff : thing.stuffs) {
            sum += stuff.f * float(stuff.i);
          }
        }
      }
    }
  }
  auto end = lv.timer.getTime();
  fmt::print("time: {}\n", end - start);
  fmt::print("sum: {}\n", sum);

  return 0;

  Engine eng;
  loop([&]() {
    return eng.frame();
  });
  return 0;
}