[PD] gain~

[Tim Blechmann]

> if somebody has built this as an external, i will bump my head onto
> the  desk the whole day
> (i guess, tim has done something like this, with SSE)
i did something like that with sse instructions, since it performs much
better than the combination of pd objects.
it includes different optimizations for 
- ramp (vector * vector)
- constant factor (vector * scalar)
- factor 1 (vector * 1 = vector)
- factor 0 (vector * 0 = 0)

instead of bumping your head onto your desk, i'd prefer you think of a
way, how to change pd that way that it optimized this patch structure to
exactly the above behaviour ;-)

cheers ... tim

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