Profiling results: - initial time: 49s - replacing default thread-safe RNG with rand.New sliced 6 seconds off. (the default RNG uses mutexes), = 43s - use fl

Profiling results: - initial time: 49s - replacing default thread-safe RNG with rand.New sliced 6 seconds off. (the default RNG uses mutexes), = 43s - use float64 instead of float32 and remove many type conversions. Another two seconds off. = 41s. As others suggested, go still lacks many compile time optimizations and the implementation could be improved.