All parallel tasks can be efficiently serialized on a fast CPU but not all serial tasks can be efficiently parallelized on many slow CPUs. From http://lesswron

All parallel tasks can be efficiently serialized on a fast CPU but not all serial tasks can be efficiently parallelized on many slow CPUs. From http://lesswrong.com/lw/k5/cached_thoughts/ http://lesswrong.com/lw/k5/cached_thoughts/ : Can you imagine having to program using 100Hz CPUs, no matter how many of them you had? You'd also need a hundred billion processors just to get anything done in realtime.