TestPrefabPerf.cpp

void TestPrefabPerformance(ecs &ECS) {
    constexpr uint32 Count = 100000;
    TStackArray<entity_view, Count> Entities;
    struct CComp1 {
        uint64 Field1;
        uint64 Field2;
        uint64 Field3;
        uint64 Field4;
        uint64 Field5;
        char Field6;
    };
    struct CComp2 {
        entity_view Field1;
    };
    struct CComp3 {
        char Field1;
    };
    auto Start1 = Time::GetClock();
    auto Prefab = ECS.prefab().set<CComp1>({{}, {}, 3, {}, {}, {}}).set<CComp2>({}).set<CComp3>({7});
    for(uint32 Index = 0; Index < Count; ++Index) {
        auto Tower = ECS.entity().is_a(Prefab);
        Entities.Add(Tower);
    }
    auto End1 = Time::GetClock();
    auto Start2 = Time::GetClock();
    for(auto Entity : Entities) {
        auto Comp1 = Entity.get<CComp1>();
        Check(Comp1->Field3 == 3);
        VolatileValue = Comp1->Field3;
        auto Comp3 = Entity.get<CComp3>();
        Check(Comp3->Field1 == 7);
        VolatileValue = Comp3->Field1;
    }
    auto End2 = Time::GetClock();
    auto Start3 = Time::GetClock();
    ECS.filter_builder<CComp1, CComp3>().build().iter([&](iter &Iter, CComp1 *Comp1s, CComp3 *Comp3s) {
        for(auto Index : Iter) {
            Check(Comp1s[Index].Field3 == 3);
            VolatileValue = Comp1s[Index].Field3;
            Check(Comp3s[Index].Field1 == 7);
            VolatileValue = Comp3s[Index].Field1;
        }
    });
    auto End3 = Time::GetClock();
    auto Query = ECS.query_builder<CComp1, CComp3>().build();
    auto Start4 = Time::GetClock();
    Query.iter([&](iter &Iter, CComp1 *Comp1s, CComp3 *Comp3s) {
        for(auto Index : Iter) {
            Check(Comp1s[Index].Field3 == 3);
            VolatileValue = Comp1s[Index].Field3;
            Check(Comp3s[Index].Field1 == 7);
            VolatileValue = Comp3s[Index].Field1;
        }
    });
    auto End4 = Time::GetClock();
    Outputf("Shared creation finished in %.6f seconds\n", Time::ClockToTime(End1 - Start1));
    Outputf("Shared .get access finished in %.6f seconds\n", Time::ClockToTime(End2 - Start2));
    Outputf("Shared filter finished in %.6f seconds\n", Time::ClockToTime(End3 - Start3));
    Outputf("Shared query finished in %.6f seconds\n", Time::ClockToTime(End4 - Start4));
}

void TestOwnedPrefabPerformance(ecs &ECS) {
    constexpr uint32 Count = 100000;
    TStackArray<entity_view, Count> Entities;
    struct CComp1 {
        uint64 Field1;
        uint64 Field2;
        uint64 Field3;
        uint64 Field4;
        uint64 Field5;
        char Field6;
    };
    struct CComp2 {
        entity_view Field1;
    };
    struct CComp3 {
        char Field1;
    };
    auto Start1 = Time::GetClock();
    auto Prefab = ECS.prefab().set<CComp1>({{}, {}, 3, {}, {}, {}}).override<CComp1>().set<CComp2>({}).override<CComp2>().set<CComp3>({7}).override<CComp3>();
    for(uint32 Index = 0; Index < Count; ++Index) {
        auto Tower = ECS.entity().is_a(Prefab);
        Entities.Add(Tower);
    }
    auto End1 = Time::GetClock();
    auto Start2 = Time::GetClock();
    for(auto Entity : Entities) {
        auto Comp1 = Entity.get<CComp1>();
        Check(Comp1->Field3 == 3);
        VolatileValue = Comp1->Field3;
        auto Comp3 = Entity.get<CComp3>();
        Check(Comp3->Field1 == 7);
        VolatileValue = Comp3->Field1;
    }
    auto End2 = Time::GetClock();
    auto Start3 = Time::GetClock();
    ECS.filter_builder<CComp1, CComp3>().build().iter([&](iter &Iter, CComp1 *Comp1s, CComp3 *Comp3s) {
        for(auto Index : Iter) {
            Check(Comp1s[Index].Field3 == 3);
            VolatileValue = Comp1s[Index].Field3;
            Check(Comp3s[Index].Field1 == 7);
            VolatileValue = Comp3s[Index].Field1;
        }
    });
    auto End3 = Time::GetClock();
    auto Query = ECS.query_builder<CComp1, CComp3>().build();
    auto Start4 = Time::GetClock();
    Query.iter([&](iter &Iter, CComp1 *Comp1s, CComp3 *Comp3s) {
        for(auto Index : Iter) {
            Check(Comp1s[Index].Field3 == 3);
            VolatileValue = Comp1s[Index].Field3;
            Check(Comp3s[Index].Field1 == 7);
            VolatileValue = Comp3s[Index].Field1;
        }
    });
    auto End4 = Time::GetClock();
    Outputf("Owned creation finished in %.6f seconds\n", Time::ClockToTime(End1 - Start1));
    Outputf("Owned .get access finished in %.6f seconds\n", Time::ClockToTime(End2 - Start2));
    Outputf("Owned filter finished in %.6f seconds\n", Time::ClockToTime(End3 - Start3));
    Outputf("Owned query finished in %.6f seconds\n", Time::ClockToTime(End4 - Start4));
}