[DrunkenCoder]

Stack access is no slower tha heap access quite often the otherway around is true because local variables often have much better locality (no pun intended).

Also the globals singeltons debacle is quite insane.
globals and degenerated singletons have the same effect greater coupling between engine/code components and harder to maintain code. The argument that they are easier to code is a moot point, industry research shows that more than 80% of development time is spent maintaining code not writing new code and heavily coupled code is harder to maintain.

Often the slightly over engineered solution is using singleton and interfaces.
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If there's life after death there is no death, if there's no death we never live. | ENTP