I am using Flash CS6 and I have a vague memory that back in the early days of Macromedia there was a way to see your code running. Literally you could see all the variables and what was happening in a tree format. [center]-[/center] [center]-[/center] Was curious if there still is a way to performance debug code for Starling/ND2D/Etc this way. A way to analyze slowdown areas like heavy loops that are not errors. [center]-[/center] [center]-[/center] My code is free of memory leaks. That is not an issue… Using hires-stats for mem/max/draw/tris.