Common update:

-added multiple new function to allocate template and add entity
-updated README.md (complete initial version)
-empty components now don't take memory
-fixedd small bug with TestRunner
-added many new tests (HashMap, Vector, EntityMeta, ...)
-added default hashing function to HashMap
-fixed critical bug with adding entities
-fixed small bug with adding entity with remplacement components
-added asserts into code to better bug detection
-small performance improvement for events
-added ComponentRef structure which contain data pointer and componentID
-remove EntityID from Event structure
-now events are handled before removing entiteis
-fixed GDC compilation
-fixed rendering of rotated sprites
-added weapons as separate entities to space ship and others
-added Tower enemy to SpaceInvaders demo
-added Boss to SpaceInvaders demo (boss has four tower attached to it)
-Boss towers shoot multiple bullets upon death
-fixed critical bug with demos switching
-fixed critical bug related to adding/removing entities form inside onAdd/onRemove entity callback
-added animation support
-added particles sypport and particles for firing and explostions, and more
-multithreaded rendering now has same rendering order as singlethreaded
-application automaticallu detect host CPU threads count
-added upgrades to SPaceInvaders demo
-fixed texture memory freeing
-improved documentation
-improved multithreaded performance
-improve shader code
-fixed registration issue
-some additional performance improvements
-added depth and colors to rendering parameters
-jobs now has names corresponding to their systems
-change execute() -> willExecute()
-added EntityMeta structure to speedup getting fetching components form entity
-improved multithreading rendering
-added possibility tio change number of threads runtime
-added bullets collision detection in SpaceInvaders demo
-some CI changes
-added VBO batch rendering (current default, no render mode switch yet)
-fixed camera positioning calculation
-fixed buffer issue with WebGL
-added viewport scalling (at least 300 pixels height). Pixels are scalled if screen is bigger.
-center demos gameplay area
-added fullpage html template for Emscripten build
-added many new sprites to atlas
-fixed critical bug with CPU usage in multithreaded mode
-snake render tile coresponding to body part
-snake is destroyed after collision and emit some particles
-added some functionality to vectors
-fixed documentation issue in Manager.d
-more minor code changes and cleanup

tests/perf.d

@@ -0,0 +1,185 @@
+module tests.perf;
+
+import tests.runner;
+
+import bubel.ecs.core;
+import bubel.ecs.manager;
+import bubel.ecs.entity;
+
+version(GNU)
+{
+	pragma(inline, true) T[n] staticArray(T, size_t n)(auto ref T[n] a)
+	{
+		return a;
+	}
+}
+else import std.array : staticArray;
+
+import core.stdc.stdio;
+
+struct CLong
+{
+    mixin ECS.Component;
+
+    alias value this;
+
+    long value = 10;
+}
+
+struct CShort
+{
+    mixin ECS.Component;
+
+    alias value this;
+
+    short value = 12;
+}
+
+struct CInt
+{
+    mixin ECS.Component;
+
+    alias value this;
+
+    int value = 10;
+}
+
+struct CUInt
+{
+    mixin ECS.Component;
+
+    alias value this;
+
+    uint value = 12;
+}
+
+struct CBig
+{
+    mixin ECS.Component;
+    uint[32] data;
+}
+
+EntityTemplate* tmpl;
+
+void beforeEveryTest()
+{
+    gEM.initialize(0);
+
+    gEM.beginRegister();
+
+    gEM.registerComponent!CLong;
+    gEM.registerComponent!CShort;
+    gEM.registerComponent!CInt;
+    gEM.registerComponent!CUInt;
+    gEM.registerComponent!CBig;
+
+    gEM.endRegister();
+    tmpl = null;
+}
+
+void afterEveryTest()
+{
+    if(tmpl)gEM.freeTemplate(tmpl);
+    tmpl = null;
+    gEM.destroy();
+}
+
+void smallTmpl()
+{
+    tmpl = gEM.allocateTemplate([CShort.component_id].staticArray);
+}
+
+void bigTmpl()
+{
+    tmpl = gEM.allocateTemplate([CBig.component_id].staticArray);
+}
+
+void multiSmallTmpl()
+{
+    tmpl = gEM.allocateTemplate([CShort.component_id, CLong.component_id, CInt.component_id, CUInt.component_id].staticArray);
+}
+
+void multiBigTmpl()
+{
+    tmpl = gEM.allocateTemplate([CLong.component_id, CInt.component_id, CUInt.component_id, CBig.component_id].staticArray);
+}
+
+@("AddEntities100k1comp2b")  @(before, &smallTmpl)
+unittest
+{
+    foreach(i; 0..100_000)gEM.addEntity(tmpl);
+}
+
+@("AddEntities100k1comp128b")  @(before, &bigTmpl)
+unittest
+{
+    foreach(i; 0..100_000)gEM.addEntity(tmpl);
+}
+
+@("AddEntities100k4comp18b")  @(before, &multiSmallTmpl)
+unittest
+{
+    foreach(i; 0..100_000)gEM.addEntity(tmpl);
+}
+
+@("AddEntities100k4comp144b")  @(before, &multiBigTmpl)
+unittest
+{
+    foreach(i; 0..100_000)gEM.addEntity(tmpl);
+}
+
+void allocDealloc100k()
+{
+    foreach(i; 0..100_000)gEM.addEntity(tmpl);
+    gEM.commit();
+    foreach(i; 0..100_000)gEM.removeEntity(EntityID(i + 1,0));
+    gEM.commit();
+}
+
+void smallTmplPreAlloc()
+{
+    tmpl = gEM.allocateTemplate([CShort.component_id].staticArray);
+    allocDealloc100k();
+}
+
+void bigTmplPreAlloc()
+{
+    tmpl = gEM.allocateTemplate([CBig.component_id].staticArray);
+    allocDealloc100k();
+}
+
+void multiSmallTmplPreAlloc()
+{
+    tmpl = gEM.allocateTemplate([CShort.component_id, CLong.component_id, CInt.component_id, CUInt.component_id].staticArray);
+    allocDealloc100k();
+}
+
+void multiBigTmplPreAlloc()
+{
+    tmpl = gEM.allocateTemplate([CLong.component_id, CInt.component_id, CUInt.component_id, CBig.component_id].staticArray);
+    allocDealloc100k();
+}
+
+@("AddEntities100k1comp2bPreAlloc")  @(before, &smallTmplPreAlloc)
+unittest
+{
+    foreach(i; 0..100_000)gEM.addEntity(tmpl);
+}
+
+@("AddEntities100k1comp128bPreAlloc")  @(before, &bigTmplPreAlloc)
+unittest
+{
+    foreach(i; 0..100_000)gEM.addEntity(tmpl);
+}
+
+@("AddEntities100k4comp18bPreAlloc")  @(before, &multiSmallTmplPreAlloc)
+unittest
+{
+    foreach(i; 0..100_000)gEM.addEntity(tmpl);
+}
+
+@("AddEntities100k4comp144bPreAlloc")  @(before, &multiBigTmplPreAlloc)
+unittest
+{
+    foreach(i; 0..100_000)gEM.addEntity(tmpl);
+}