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skeptical_lurker comments on LINK: Nematode brain uploaded with success - Less Wrong Discussion
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This gives us an upper bound of about 1.5MB ram / 100KFLOPs/10 cents per neuron. Possibly a lot lower.
If you look at the description you find that the model used is very simple and bois down to probably less than N*M*2 machine instructions per cycle (N=number of neurons, here 302, M=average fan in). Because the operation is really only sum and threashold. I can only guess at M but even if we approximate it with N a raspberry pi with ARM Core M 700 MHz should be able to run a nematode connectome at about 4000x its natural speed.
The point here is not the necessary speed but the ease of simulation and visualization of effects.