docs

doc/flame/components.md

@@ -428,7 +428,7 @@ removing it from the tree. This affects the visibility of the component and all
 /// Example that implements HasVisibility
 class MyComponent extends PositionComponent with HasVisibility {}
 
-/// Usage of the isVisible property 
+/// Usage of the isVisible property
 final myComponent = MyComponent();
 add(myComponent);
 

doc/flame/other/debug.md

@@ -35,3 +35,43 @@ commonly want to show the current FPS somewhere when the `FpsComponent` is used.
 
 
 [TextComponent]: ../rendering/text_rendering.md#textcomponent
+
+### ChildCounterComponent<T>
+
+`ChildCounterComponent` is a component that can be added to a game and will every second render
+the number of children of type `T` from a component. So for example:
+
+```dart
+add(
+ ChildCounterComponent<SpriteAnimationComponent>(
+ target: world,
+ ),
+);
+```
+
+Will render the number of `SpriteAnimationComponent` that are children of the game `world`.
+
+### TimeTrackComponent
+
+This component allows developers to track time spent inside their code. This can be useful for
+performance debugging time spent in certain parts of the code.
+
+To use it, add it to your game somewhere (since this is a debug feature, we advise to only add the
+component in a debug build/flavor):
+
+```dart
+add(TimeTrackComponent());
+```
+
+Then in the code section that you want to track time, do the following:
+
+```dart
+void update(double dt) {
+ TimeTrackComponent.start('MyComponent.update');
+ // ...
+ TimeTrackComponent.end('MyComponent.update');
+}
+```
+
+With the calls above, the added `TimeTrackComponent` will render the ellapsed time in
+microseconds.