-LinearLayout implemntation:

*Entity.getComponent works
 *adding/removing objects work
 *update work

dub.json

@@ -10,6 +10,9 @@
 	"versions": [
 		"LinearLayout"
 	],
+	"dflags-posix-ldc": [
+		"-defaultlib=phobos2-ldc,druntime-ldc"
+	],
 	"configurations" : [
 		{
 			"name" : "library",

source/ecs/block_allocator.d

@@ -7,7 +7,7 @@ import std.experimental.allocator.mallocator : AlignedMallocator, Mallocator;
 
 struct BlockAllocator(uint block_size, uint blocks_in_allocation)
 {
-    void* next_block;
+    void* next_block = null;
 
     void* getBlock()
     {

source/ecs/entity.d

@@ -20,10 +20,22 @@ struct Entity
     T* getComponent(T)()
     {
         EntityManager.EntitiesBlock* block = gEM.getMetaData(&this);
-        EntityManager.EntityInfo* info = block.type_data;
+        EntityManager.EntityInfo* info = block.type_info;
-        if(T.component_id >= info.deltas.length || info.deltas[T.component_id] == 0)return null;
+        if (T.component_id >= info.deltas.length || info.deltas[T.component_id] == 0)
+            return null;
+        version (LinearLayout)
+        {
+            static if (EntityID.sizeof == 8)
+                uint ind = cast(uint)((cast(void*)&this - block.dataBegin()) >> 3);
+            else
+                uint ind = cast(uint)((cast(void*)&this - block.dataBegin()) / EntityID.sizeof());
+            return cast(T*)(cast(void*)block + info.deltas[T.component_id] + ind * T.sizeof);
+        }
+        else
+        {
             return cast(T*)(cast(void*)&this + info.deltas[T.component_id]);
         }
+    }
 }
 
 export struct EntityTemplate

source/ecs/manager.d

@@ -72,7 +72,24 @@ class EntityManager
             alias storages = ParameterStorageClassTuple!(Sys.update);
             static string genCall()()
             {
-                string ret = "s.update(*cast(Entity*)data_pointer,";
+                string ret;
+                version (LinearLayout)
+                {
+                    {
+                        uint i = 0;
+                        uint opt = 0;
+                        static foreach (param; (Parameters!(Sys.update))[1 .. $])
+                        {
+                            i++;
+                            if (isPointer!param)
+                            {
+                                ret ~= "if(opt_ptr" ~ opt.to!string ~ " !is null)opt_ptr"
+                                    ~ opt.to!string ~ " = &opt_array" ~ opt.to!string ~ "[i];";
+                                opt++;
+                            }
+                        }
+                    }
+                }
                 /*foreach (i; 1 .. (Parameters!(Sys.update)).length)
                 {
                     ret ~= "*cast(types[" ~ i.to!string ~ "]*)(pointers[" ~ (i - 1)
@@ -81,6 +98,25 @@ class EntityManager
                 uint i = 0;
                 uint req = 0;
                 uint opt = 0;
+                version (LinearLayout)
+                {
+                    ret ~= "s.update(id_array[i],";
+                    static foreach (param; (Parameters!(Sys.update))[1 .. $])
+                    {
+                        i++;
+                        if (isPointer!param)
+                        {
+                            ret ~= "opt_ptr" ~ (opt++).to!string ~ ",";
+                        }
+                        else
+                        {
+                            ret ~= "array" ~ (req++).to!string ~ "[i],";
+                        }
+                    }
+                }
+                else
+                {
+                    ret ~= "s.update(*cast(Entity*)data_pointer,";
                     static foreach (param; (Parameters!(Sys.update))[1 .. $])
                     {
                         i++;
@@ -95,10 +131,38 @@ class EntityManager
                                 .to!string ~ "]),";
                         }
                     }
+                }
+
                 ret ~= ");";
                 return ret;
             }
 
+            static string genArrays()()
+            {
+                string ret;
+
+                uint i = 0;
+                uint req = 0;
+                uint opt = 0;
+                static foreach (param; (Parameters!(Sys.update))[1 .. $])
+                {
+                    i++;
+                    if (isPointer!param)
+                    {
+                        ret ~= "PointerTarget!(types[" ~ i.to!string
+                            ~ "])[] opt_array" ~ opt.to!string ~ ";";
+                        ret ~= "types[" ~ i.to!string ~ "] opt_ptr" ~ opt.to!string ~ ";";
+                        opt++;
+                    }
+                    else
+                    {
+                        ret ~= "types[" ~ i.to!string ~ "][] array" ~ req.to!string ~ " = (cast(types[" ~ i.to!string ~ "]*)(cast(void*)block + info.deltas[types[" ~ i.to!string ~ "].component_id]))[0..block.entities_count];";
+                        req++;
+                    }
+                }
+                return ret;
+            }
+
             static string genCompList()()
             {
                 string ret = "ushort comp;uint req;uint opt;";
@@ -154,7 +218,39 @@ class EntityManager
                     EntitiesBlock* block = data.info.first_block;
                     while (block !is null)
                     {
-                        uint size = block.type_data.size;
+                        version (LinearLayout)
+                        {
+                            //uint size = block.type_info.size;
+                            /*void* data_pointer = block.dataBegin();
+                            foreach (i, ref pointer; pointers)
+                            {
+                                pointer = cast(void*) block + data.deltas[i];
+                            }
+                            foreach (i, ref pointer; optional_pointers)
+                            {
+                                uint ind = cast(uint)(i + pointers.length);
+                                if (data.deltas[ind] != uint.max)
+                                    pointer = cast(void*) block + data.deltas[ind];
+                                else
+                                    pointer = null;
+                            }*/
+                            EntityInfo* info = block.type_info;
+                            Entity[] id_array = (cast(Entity*)block.dataBegin())[0..block.entities_count];
+                            mixin(genArrays());
+                            foreach (i; 0 .. block.entities_count)
+                            {
+                                mixin(genCall());
+                                //data_pointer += EntityID.sizeof; //data.info.size;
+                                /*foreach (ref pointer; pointers)
+                                    pointer += size;
+                                foreach (ref pointer; optional_pointers)
+                                    if (pointer != null)
+                                        pointer += size;*/
+                            }
+                        }
+                        else
+                        {
+                            uint size = block.type_info.size;
                             void* data_pointer = block.dataBegin();
                             foreach (i, ref pointer; pointers)
                             {
@@ -178,6 +274,7 @@ class EntityManager
                                     if (pointer != null)
                                         pointer += size;
                             }
+                        }
                         block = block.next_block;
                     }
 
@@ -393,11 +490,22 @@ class EntityManager
         temp.info = info;
 
         //fill components with default data
+        version (LinearLayout)
+        {
+            foreach (comp; info.components)
+            {
+                temp.entity_data[info.tmpl_deltas[comp] .. info.tmpl_deltas[comp] + components[comp].size]
+                    = components[comp].init_data;
+            }
+        }
+        else
+        {
             foreach (comp; info.components)
             {
                 temp.entity_data[info.deltas[comp] .. info.deltas[comp] + components[comp].size]
                     = components[comp].init_data;
             }
+        }
 
         return temp;
     }
@@ -412,6 +520,23 @@ class EntityManager
             info.components = Mallocator.instance.makeArray(ids);
             info.deltas = Mallocator.instance.makeArray!ushort(ids[$ - 1] + 1);
 
+            version (LinearLayout)
+            {
+                info.tmpl_deltas = Mallocator.instance.makeArray!ushort(ids[$ - 1] + 1);
+                uint block_memory = page_size - EntitiesBlock.sizeof;
+                uint entity_comps_size = EntityID.sizeof;
+                uint mem_begin = EntitiesBlock.sizeof;
+
+                foreach (id; ids)
+                {
+                    entity_comps_size += components[id].size;
+                }
+
+                uint entites_in_block = block_memory / entity_comps_size;
+                info.max_entities = cast(ushort) entites_in_block;
+                uint current_delta = cast(uint)(mem_begin + entites_in_block * EntityID.sizeof);
+            }
+
             info.size = EntityID.sizeof;
             info.alignment = EntityID.alignof;
 
@@ -419,11 +544,29 @@ class EntityManager
             {
                 info.alignment = max(info.alignment, components[id].alignment);
                 alignNum(info.size, components[id].alignment);
+
+                version (LinearLayout)
+                {
+                    info.tmpl_deltas[id] = info.size;
+
+                    info.deltas[id] = cast(ushort) current_delta;
+                    current_delta += entites_in_block * components[id].size;
+                }
+                else
+                {
                     info.deltas[id] = info.size;
+                }
+
                 info.size += components[id].size;
             }
             alignNum(info.size, info.alignment);
 
+            version (LinearLayout)
+            {
+            }
+            else
+                info.max_entities = (page_size - EntitiesBlock.sizeof) / info.size;
+
             foreach (uint i, ref system; systems)
             {
                 if (system.m_update is null)
@@ -497,7 +640,6 @@ class EntityManager
             delta_id++;
         }
 
-
         call_data.deltas = Mallocator.instance.makeArray(deltas); //Mallocator.instance.makeArray!ushort(system.m_components.length);
 
         uint index = 0;
@@ -527,9 +669,10 @@ class EntityManager
     private void __removeComponents(EntityID entity_id, ushort[] del_ids)
     {
         Entity* entity = id_manager.getEntityPointer(entity_id);
-        if(!entity)return;
+        if (!entity)
+            return;
         EntitiesBlock* block = getMetaData(entity);
-        EntityInfo* info = block.type_data;
+        EntityInfo* info = block.type_info;
 
         qsort(del_ids.ptr, del_ids.length, ushort.sizeof, &compareUShorts);
 
@@ -598,9 +741,10 @@ class EntityManager
     {
         uint num = cast(uint) new_ids.length;
         Entity* entity = id_manager.getEntityPointer(entity_id);
-        if(!entity)return;
+        if (!entity)
+            return;
         EntitiesBlock* block = getMetaData(entity);
-        EntityInfo* info = block.type_data;
+        EntityInfo* info = block.type_info;
         ushort[] ids = (cast(ushort*) alloca(ushort.sizeof * (info.components.length + num)))[0
             .. info.components.length + num];
         /*ushort[num] new_ids;
@@ -717,7 +861,7 @@ class EntityManager
         const uint num = Components.length;
         Entity* entity = id_manager.getEntityPointer(entity_id);
         EntitiesBlock* block = getMetaData(entity);
-        EntityInfo* info = block.type_data;
+        EntityInfo* info = block.type_info;
         ushort[] ids = (cast(ushort*) alloca(ushort.sizeof * (info.components.length + num)))[0
             .. info.components.length + num];
         ushort[num] new_ids;
@@ -755,10 +899,25 @@ class EntityManager
     export ref Entity addEntity(EntityTemplate* tmpl)
     {
         EntitiesBlock* block = findBlockWithFreeSpace(tmpl.info);
+        uint id = (block.entities_count + block.added_count);
+        EntityInfo* info = tmpl.info;
 
-        void* start = block.dataBegin() + (block.entities_count + block.added_count)
+        version (LinearLayout)
-            * tmpl.info.size;
+        {
-        memcpy(start, tmpl.entity_data.ptr, tmpl.info.size);
+            void* data_begin = block.dataBegin();
+            void* start = data_begin + EntityID.sizeof * id;
+            //memcpy(data_begin + EntityID.sizeof * id, tmpl.entity_data.ptr, EntityID.sizeof);
+            foreach (i, comp; info.components)
+            {
+                memcpy(cast(void*) block + info.deltas[comp] + components[comp].size * id,
+                        tmpl.entity_data.ptr + info.tmpl_deltas[comp], components[comp].size);
+            }
+        }
+        else
+        {
+            void* start = block.dataBegin() + id * info.size;
+            memcpy(start, tmpl.entity_data.ptr, info.size);
+        }
 
         if (!block.added_count)
             blocks_to_update.add(block);
@@ -791,14 +950,15 @@ class EntityManager
                 {
                     previous_block.next_block = block;
                     block.prev_block = previous_block;
-                    block.id = previous_block.id + 1;
+                    block.id = cast(ushort)(previous_block.id + 1);
                 }
                 info.first_with_free_space = block;
                 break; // new block certainly has free space
             }
             // check if there is enought space
-            if (block.dataDelta() + (
+            /*if (block.dataDelta() + (
-                    block.entities_count + block.added_count + 1) * info.size > page_size)
+                    block.entities_count + block.added_count + 1) * info.size > page_size)*/
+            if (block.entities_count + block.added_count >= block.type_info.max_entities)
             {
                 previous_block = block;
                 block = block.next_block;
@@ -834,41 +994,66 @@ class EntityManager
     {
         //pos is Entity number in block
         void* data_begin = block.dataBegin();
-        uint pos = cast(int)(cast(void*) entity - data_begin) / block.type_data.size;
+        EntityInfo* info = block.type_info;
 
         block.entities_count--;
 
         //set "first_with_free_space" if should it be
-        if (block.type_data.first_with_free_space.id > block.id)
+        if (info.first_with_free_space.id > block.id)
-            block.type_data.first_with_free_space = block;
+            info.first_with_free_space = block;
+
+        version (LinearLayout)
+        {
+            static if (EntityID.sizeof == 8)
+                uint pos = cast(uint)((cast(void*) entity - data_begin) >> 3);
+            else
+                uint pos = cast(uint)((cast(void*) entity - data_begin) / EntityID.sizeof());
 
             if (call_destructors)
             {
-            void* data = data_begin + pos * block.type_data.size;
+                //void* data = data_begin + pos * info.size;
-            foreach (comp; block.type_data.components)
+                foreach (comp; info.components)
                 {
                     if (components[comp].destroy_callback)
                     {
-                    components[comp].destroy_callback(data + block.type_data.deltas[comp]);
+                        //components[comp].destroy_callback(data + info.deltas[comp]);
+                        components[comp].destroy_callback(cast(
+                                void*) block + info.deltas[comp] + pos * components[comp].size);
+                    }
+                }
+            }
+        }
+        else
+        {
+            uint pos = cast(int)(cast(void*) entity - data_begin) / info.size;
+            if (call_destructors)
+            {
+                void* data = data_begin + pos * info.size;
+                foreach (comp; info.components)
+                {
+                    if (components[comp].destroy_callback)
+                    {
+                        components[comp].destroy_callback(data + info.deltas[comp]);
+                    }
                 }
             }
         }
 
         if (block.entities_count == 0)
         {
-            if (block.type_data.first_block is block)
+            if (info.first_block is block)
             {
-                block.type_data.first_block = block.next_block;
+                info.first_block = block.next_block;
             }
-            if (block.type_data.first_with_free_space is block)
+            if (info.first_with_free_space is block)
             {
-                block.type_data.first_with_free_space = block.next_block;//block.type_data.first_block;
+                info.first_with_free_space = block.next_block; //info.first_block;
             }
             if (block.prev_block)
             {
                 block.prev_block.next_block = block.next_block;
             }
-            if(block.next_block)
+            if (block.next_block)
             {
                 block.next_block.prev_block = block.prev_block;
             }
@@ -879,14 +1064,27 @@ class EntityManager
         if (pos == block.entities_count)
             return;
 
+        version (LinearLayout)
+        {
+            foreach (comp; info.components)
+            {
+                void* ptr = cast(void*) block + info.deltas[comp];
+                uint size = components[comp].size;
+                memcpy(ptr + pos * size, ptr + block.entities_count * size, size);
+            }
+
+            entity.id = *cast(EntityID*)(data_begin + block.entities_count * EntityID.sizeof);
+        }
+        else
+        {
             //copy memory of last entity to position of removed entity
-        void* src = data_begin + block.entities_count * block.type_data.size;
+            void* src = data_begin + block.entities_count * info.size;
-        void* dst = data_begin + pos * block.type_data.size;
+            void* dst = data_begin + pos * info.size;
-
-        memcpy(dst, src, block.type_data.size);
 
+            memcpy(dst, src, info.size);
+        }
         //update pointer for moved entity ID
-        entity = cast(Entity*) dst;
+        //entity = cast(Entity*) dst;
         entity.updateID();
     }
 
@@ -981,7 +1179,7 @@ class EntityManager
         removeEntities();
         changeEntites();
 
-        clearEvents();
+        //clearEvents();
     }
 
     struct ComponentInfo
@@ -1006,12 +1204,27 @@ class EntityManager
     {
         ///entity components
         ushort[] components;
+
+        version (LinearLayout)
+        {
+            ///deltas in memory for components in EntitiesBlock
+            ushort[] deltas;
+            ///deltas in memory for components in EntityTemplate
+            ushort[] tmpl_deltas;
+        }
+        else
+        {
             ///deltas in memory for components
             ushort[] deltas;
+        }
+
         ///alignment of whole entity
-        ushort alignment;
+        ushort alignment; //unused in linear-layout
         ///size of entity (with alignment respect)
         ushort size;
+        ///max number of entities in block
+        ushort max_entities;
+
         ///pointer to first block/page
         EntitiesBlock* first_block;
         ///a hint for allocations
@@ -1029,7 +1242,7 @@ class EntityManager
         uint dataDelta()
         {
             ushort dif = EntitiesBlock.sizeof;
-            alignNum(dif, type_data.alignment);
+            alignNum(dif, type_info.alignment);
             return dif;
         }
 
@@ -1037,23 +1250,29 @@ class EntityManager
         export void* dataBegin()
         {
             ushort dif = EntitiesBlock.sizeof;
-            alignNum(dif, type_data.alignment);
+            version (LinearLayout)
+            {
+            }
+            else
+                alignNum(dif, type_info.alignment);
             return cast(void*)&this + dif;
         }
 
         ///pointer to Entity type info
-        EntityInfo* type_data = null;
+        EntityInfo* type_info = null;
         ///number of entities in block
         ushort entities_count = 0;
         ///number of new entities in block
         ushort added_count = 0;
         ///block id
-        uint id = 0;
+        ushort id = 0;
+        ///maximum number of entities in block
+        //ushort max_entities = 0;
         ///pointer to next block/page
         EntitiesBlock* next_block = null;
         ///pointer to next block/page
         EntitiesBlock* prev_block = null;
-        //there is a loooot of data (4kB, pure magic)
+        //there is a loooot of data (some kB of memory, pure magic)
     }
 
     /************************************************************************************************************************
@@ -1068,7 +1287,7 @@ class EntityManager
         ///poiner to Entity type info
         EntityManager.EntityInfo* info;
         ///deltas for components
-        ushort[] deltas;
+        ushort[] deltas; //unused in linear-layout
     }
 
     alias SytemFuncType = void function(ref EntityManager.CallData data, void* entity);
@@ -1078,7 +1297,7 @@ class EntityManager
     //alias event_manager this;
 
     ///Single page size. Must be power of two.
-    enum page_size = 4096;
+    enum page_size = 32768; //4096;
     ///Number of pages in block.
     enum pages_in_block = 128;
 

tests/tests.d

@@ -23,11 +23,11 @@ int main()
 		float a;
 	}
 
-	struct TestComp
+	static struct TestComp
 	{
 		__gshared ushort component_id;
-		int a;
+		int a = 1;
-		ulong b;
+		ulong b = 2;
 
 		static void serializeComponent(SerializeVector output)
 		{
@@ -40,11 +40,11 @@ int main()
 		}
 	}
 
-	struct TestComp2
+	static struct TestComp2
 	{
 		__gshared ushort component_id;
-		int b;
+		int b = 3;
-		int a;
+		int a = 4;
 
 		static void serializeComponent(ref TestComp comp, SerializeVector output)
 		{
@@ -57,11 +57,11 @@ int main()
 		}
 	}
 
-	struct TestComp3
+	static struct TestComp3
 	{
 		__gshared ushort component_id;
-		uint gg; //good game
+		uint gg = 5; //good game
-		uint bg; //bad game
+		uint bg = 6; //bad game
 
 		void serializeComponent(SerializeVector output)
 		{
@@ -74,11 +74,15 @@ int main()
 		}
 	}
 
-	struct TestComp4
+	static struct TestComp4
 	{
 		__gshared ushort component_id;
-		uint gg; //good game
+		uint gg = 7; //good game
-		uint bg; //bad game
+		uint bg = 8; //bad game
+		ulong a;
+		ulong b;
+		ulong c;
+		ulong g;
 
 		static void serializeComponent(ref TestComp comp, SerializeVector output)
 		{
@@ -107,12 +111,12 @@ int main()
 
 		void onBegin()
 		{
-			writeln("On Test System begin.");
+			//writeln("On Test System begin.");
 		}
 
 		void onEnd()
 		{
-			writeln("On Test System end.");
+			//writeln("On Test System end.");
 		}
 
 		void initialize(ref Entity entity, ref TestComp comp)
@@ -127,7 +131,7 @@ int main()
 			@("optional") TestComp3* test3;
 		}
 
-		void update(ref Entity entity, ref TestComp test, ref TestComp2 test2, TestComp3* test3) //ref TestComp comp)
+		void update(ref Entity entity, ref TestComp test, ref TestComp2 test2)//, TestComp3* test3) //ref TestComp comp)
 		{
 			assert(cast(size_t)&test % TestComp.alignof == 0);
 			assert(cast(size_t)&test2 % TestComp2.alignof == 0);
@@ -141,8 +145,12 @@ int main()
 			test2.a = 8;
 			//writeln("Jakis tekst! ",test2.b);
 			//writeln("Low priority tekst! ");
-			if (test3)
+			/*if (test3)
+			{
 				test3.gg = 200;
+				test3.bg += 1;
+			}*/
+				
 		}
 
 		void handleEvent(TestEvent event, ref TestComp test, ref TestComp2 test2, TestComp3* test3)
@@ -209,6 +217,21 @@ int main()
 		}*/
 	}
 
+	void writeEntityComponents(Entity* entity)
+	{
+		write(entity.id);
+		TestComp* test_comp = entity.getComponent!TestComp;
+		if(test_comp)write(*test_comp);
+		TestComp2* test_comp2 = entity.getComponent!TestComp2;
+		if(test_comp2)write(*test_comp2);
+		TestComp3* test_comp3 = entity.getComponent!TestComp3;
+		if(test_comp3)write(*test_comp3);
+		TestComp4* test_comp4 = entity.getComponent!TestComp4;
+		if(test_comp4)write(*test_comp4);
+		writeln();
+		//writeln((cast(uint*) pp)[0 .. 14], " ", pp);
+	}
+
 	EntityManager.initialize();
 	assert(gEM !is null);
 
@@ -237,14 +260,24 @@ int main()
 
 	time = MonoTime.currTime;
 
-	ushort[2] ids = [TestComp2.component_id, TestComp.component_id];
+	ushort[3] ids = [TestComp2.component_id, TestComp.component_id, TestComp4.component_id];
 	EntityTemplate* tmpl = gEM.allocateTemplate(ids);
+
+	ushort[3] ids2 = [TestComp3.component_id, TestComp.component_id, TestComp4.component_id];
+	EntityTemplate* tmpl2 = gEM.allocateTemplate(ids2);
 	//writeln(tmpl.info.components[]);
-	*cast(EntityID*) tmpl.entity_data.ptr = EntityID(1, 1);
+	//*cast(EntityID*) tmpl.entity_data.ptr = EntityID(1, 1);
 
 	dur = (MonoTime.currTime - time).total!"usecs";
 	writeln("Template allocating: ", dur, " usecs");
 
+	Entity entity;
+
+	{
+		entity = gEM.addEntity(tmpl);
+		writeEntityComponents(gEM.getEntity(entity.id));
+	}	
+	
 	time = MonoTime.currTime;
 
 	//foreach(i; 0..1_000_000)gEM.addEntity(tmpl);
@@ -253,13 +286,18 @@ int main()
 
 	EntityID[1000] idss;
 
-	foreach (i; 0 .. 1_000)
+	/*foreach (i; 0 .. 1_000)
 	{
+		gEM.begin();
 		foreach (j; 0 .. 1_000)
 			idss[j] = gEM.addEntity(tmpl).id;
 		foreach (j; 0 .. 1_000)
 			gEM.removeEntity(idss[j]);
-	}
+		gEM.end();
+	}*/
+
+	dur = (MonoTime.currTime - time).total!"usecs";
+	writeln("Entities adding: ", dur, " usecs");
 
 	uint blocks = 0;
 	foreach (info; &gEM.entities_infos.byValue)
@@ -273,13 +311,6 @@ int main()
 	}
 	writeln("Entities blocks: ", blocks);
 
-	/*Entity entity = gEM.addEntity(tmpl);
-	gEM.removeEntity(entity.id);
-	gEM.addEntity(tmpl);*/
-
-	dur = (MonoTime.currTime - time).total!"usecs";
-	writeln("Entities adding: ", dur, " usecs");
-
 	//foreach(j; 0..1_000)gEM.addEntity(tmpl);
 
 	gEM.registerSystem!TestSystem2(0);
@@ -287,43 +318,69 @@ int main()
 	//assert(*(cast(EntityID*)(cast(void*)tmpl.info.first_block+24)) == EntityID(1,1));
 	//assert(*(cast(EntityID*)(cast(void*)tmpl.info.first_block+48)) == EntityID(1,1));
 
+	foreach (i; 0 .. 500_000)
+	{
+		gEM.addEntity(tmpl);
+		gEM.addEntity(tmpl2);
+	}
+
 	time = MonoTime.currTime;
 
-	//gEM.update();
-
-	dur = (MonoTime.currTime - time).total!"usecs";
-	writeln("Update: ", dur, " usecs");
-
-	Entity entity = gEM.addEntity(tmpl);
-
 	gEM.begin();
 	gEM.update();
 	gEM.end();
 
-	Entity* pp = gEM.getEntity(entity.id);
+	dur = (MonoTime.currTime - time).total!"usecs";
-	writeln((cast(uint*) pp)[0 .. 14], " ", pp);
+	writeln("Update: ", dur, " usecs");
+
+	time = MonoTime.currTime;
+
+	gEM.begin();
+	gEM.update();
+	gEM.end();
+
+	dur = (MonoTime.currTime - time).total!"usecs";
+	writeln("Update: ", dur, " usecs");
+
+	time = MonoTime.currTime;
+
+	gEM.begin();
+	gEM.update();
+	gEM.end();
+
+	dur = (MonoTime.currTime - time).total!"usecs";
+	writeln("Update: ", dur, " usecs");
+
+	writeEntityComponents(gEM.getEntity(entity.id));
+
+	entity = gEM.addEntity(tmpl);
+
+	gEM.begin();
+	gEM.update();
+	gEM.end();
+
+	//Entity* pp;// = gEM.getEntity(entity.id);
+	//writeln((cast(uint*) pp)[0 .. 14], " ", pp);
+	writeEntityComponents(gEM.getEntity(entity.id));
 
 	gEM.addEntity(tmpl);
 
+	gEM.addComponents(entity.id, TestComp4());
 	gEM.addComponents(entity.id, TestComp3());
 
 	gEM.begin();
 	gEM.update();
 	gEM.end();
 
-	pp = gEM.getEntity(entity.id);
+	writeEntityComponents(gEM.getEntity(entity.id));
 
-	writeln((cast(uint*) pp)[0 .. 14], " ", pp);
+	gEM.removeComponents!(TestComp)(entity.id);
-
-	//gEM.removeComponents!(TestComp)(entity.id);
 
 	gEM.begin();
 	gEM.update();
 	gEM.end();
 
-	pp = gEM.getEntity(entity.id);
+	writeEntityComponents(gEM.getEntity(entity.id));
-
-	writeln((cast(uint*) pp)[0 .. 14], " ", pp);
 
 	//import std.stdio;
 	//writeln((cast(uint*)tmpl.info.first_block)[0..48]);