Faster hardware costs money. If this works well, and it stops being a PoC, why pay extra when you can simply add an annotation to a method, and your speed gain is free?
You should really read that article. Just below the fold:
> Everything is fast for small n. When n gets large, that's when things start to go sideways. The above graph of an ancient Trash-80 clobbering a semi-modern DEC Alpha is a sobering reminder that the fastest hardware in the world can't save you from bad code.