Changes

func MultiPI(samples int) float64 {

runtime.GOMAXPROCS(runtime.NumCPU())

cpus := runtime.NumCPU()

threadSamples := samples / cpus

results := make(chan float64, cpus)

for j := 0; j < cpus; j++ {

var inside int

r := rand.New(rand.NewSource(time.Now().UnixNano()))

for i := 0; i < threadSamples; i++ {

x, y := r.Float64(), r.Float64()

}

}

results <- float64(inside) / float64(threadSamples) * 4

}()

}

var total float64

for i := 0; i < cpus; i++ {

total += <-results

}

return total / float64(cpus)

}

</syntaxhighlight>