main.go

@@ -7,13 +7,14 @@ import (
 	"math"
 	"math/rand"
 	"os"
+	"runtime"
 	"time"
 )
 
 const (
 	randomMin  = 0
 	randomMax  = 9999999999999999
-	numSamples = 100000000
+	numSamples = 10000000
 )
 
 func main() {
@@ -33,8 +34,13 @@ func main() {
 	log.Printf("generating numbers...")
 
 	rand.Seed(time.Now().UnixNano())
+	generatedNumbers := make(chan int, 1024)
+	for i := 0; i < runtime.NumCPU(); i++ {
+		go generatorWorker(generatedNumbers)
+	}
+
 	for currentSample = 0; currentSample < numSamples; currentSample++ {
-		results[firstDigit(rand.Intn(randomMax-randomMin+1)+randomMin)-1]++ // We must use Intn instead of Int because from Base10's perspective, integers cut off at a really weird spot
+		results[firstDigit(<-generatedNumbers)-1]++
 	}
 
 	statusTicker.Stop()
@@ -49,6 +55,12 @@ func main() {
 	bufio.NewReader(os.Stdin).ReadBytes('\n')
 }
 
+func generatorWorker(returnChannel chan int) {
+	for {
+		returnChannel <- rand.Intn(randomMax-randomMin+1) + randomMin // We must use Intn instead of Int because from Base10's perspective, integers cut off at a really weird spot
+	}
+}
+
 // firstDigit returns the first/leftmost digit of the base10 representation of an integer
 func firstDigit(x int) int {
 	return int(math.Abs(float64(x)) / math.Pow(10, float64(numDigits(x)-1)))