SanderMertens

#include <prefab_storage_tests.h>
#include <stdio.h>

ECS_COMPONENT_DECLARE(Position);
ECS_COMPONENT_DECLARE(Rotation);
ECS_COMPONENT_DECLARE(Velocity);
ECS_COMPONENT_DECLARE(Transform);
ECS_COMPONENT_DECLARE(TransformRef);
ECS_COMPONENT_DECLARE(Parent);
ECS_COMPONENT_DECLARE(Children);

SanderMertens

using flecs.script.*
using flecs.components.*
using flecs.game

const Stone = Rgb: {0.4, 0.3, 0.3}
const SideWalk = Rgb: {0.4, 0.4, 0.4}
const Concrete = Rgb: {0.3, 0.3, 0.3}
const Door = Rgb: {0.1, 0.07, 0.04}
const Frame = Rgb: {0.7, 0.7, 0.7}
const Awning = Rgb: {0.06, 0.08, 0.05}

SanderMertens

// Code uses a custom benchmarking solution (vs. criterion) so that the numbers
// are comparable to the Flecs benchmarks in this repository: 
//   https://github.com/SanderMertens/ecs_benchmark 

use bevy_ecs::prelude::*;
// use bevy_hierarchy::*;
use bevy_ecs::world::CommandQueue;
use std::hint::black_box;

use rand;

SanderMertens

// Test for importing script from URL
using flecs.components.*
using flecs.game
using assemblies

town :- Town{}

SanderMertens

#include <c_app.h>
#include "flecs.h"
#include <stdio.h>
#include <stdlib.h>

#define STARS                    (1000)
#define PLANETS_MAX              (10)
#define P_PLANET_WATER           (0.1)
#define P_PLANET_OIL             (0.005)
#define P_PLANET_COPPER          (0.05)

SanderMertens

Clang

8

size_t pretty_type() [T = Position]
size_t pretty_enum() [E = Color, C = Red]
size_t pretty_enum() [E = Color, C = 3]

SanderMertens

#include <bench_path.h>
#include <stdio.h>
#include <stdlib.h>
#include "entt.hpp"

#define MILLION (1000 * 1000)
#define BILLION (1000 * MILLION)

#define ENTITY_COUNT (255)
#define COMPONENT_COUNT (10)

SanderMertens

entity.add<MeleeUnit>();

SanderMertens

// Utility for adding features (mixins) to a class without modifying its 
// definition.

// -- Mixin code

// Create macro for mixin template type so we don't go cross-eyed
#define MIXIN template<typename Self> typename

// Template that can store a list of mixin templates

SanderMertens

// Summary of Flecs data structures
// This is a non-exhaustive overview of flecs datastructures. Things have been ommitted/have different names for clarity.


// --- DATASTRUCTURES

// A sparse set is a map-like structure that guarantees O(1) lookup times (as opposed to O(1) on average for maps) at the cost of
// requiring more RAM (more info on the general idea of sparse sets: https://www.geeksforgeeks.org/sparse-set/)
struct ecs_sparse_t { };