AS3 has 2 rendering modes: CPU - this is an old API that can render vector based graphics. Every game before 2011 uses this API. GPU - Adobe introduced a thin

AS3 has 2 rendering modes: CPU - this is an old API that can render vector based graphics. Every game before 2011 uses this API. GPU - Adobe introduced a thin OpenGL wrapper around 2011. This is a completely new API and looks very similar to OpenGL. I guess Haxe code looks much more similar to a game written in OpenGL, this they rewrote the rendering pipeline (and converted all assets from vector animations to sprite sheets.)