calculation-speed comparison

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Just now we discussed whether a calculation of sines in init and storing them in megabuf or calculating them directly in point would be faster. So i tried to make a preset to compare both kinds. Unfortunately i don't get it to work. It'd be kind if someone could check where in the code i made the mistake.
Thanks a lot!

/edit: i know that i "deactivated" one line of code using "//", but that's not the mistake...