haxe 3.3 :

haxe 3.2.1 :

haxe dev :

lib to gather gc usage in code See Tests/src/TestAll.hx for code examples

The Tests also serve as a live documentation on how Haxe and hxcpp deal with various type regarding gc usage.

The most notable is how adding a first element to an array or map create allocation on top of the one required for creating the array/map in the first place.