Refactor with switch, update benchmark stats

raindrops.go

@@ -6,22 +6,28 @@ const testVersion = 2
 
 func Convert(i int) string {
 	var s string
-	if i%3 == 0 {
-		s += "Pling"
-	}
-	if i%5 == 0 {
-		s += "Plang"
-	}
-	if i%7 == 0 {
-		s += "Plong"
-	}
-	if s == "" {
+	switch {
+	case i%3+i%5+i%7 == 0:
+		s = "PlingPlangPlong"
+	case i%3+i%5 == 0:
+		s = "PlingPlang"
+	case i%3+i%7 == 0:
+		s = "PlingPlong"
+	case i%3 == 0:
+		s = "Pling"
+	case i%5+i%7 == 0:
+		s = "PlangPlong"
+	case i%5 == 0:
+		s = "Plang"
+	case i%7 == 0:
+		s = "Plong"
+	default:
 		s = strconv.Itoa(i)
 	}
 	return s
 }
 
-// Iteration 1 Benchmark
+// Iteration 2 Benchmark
 // PASS
-// BenchmarkConvert-12	 2000000	       676 ns/op
-// ok  	exercism/go/raindrops	2.048s
+// BenchmarkConvert-12	 5000000	       309 ns/op
+// ok  	exercism/go/raindrops	1.869s

switch.bench

@@ -0,0 +1,3 @@
+PASS
+BenchmarkConvert-12	 5000000	       309 ns/op
+ok  	exercism/go/raindrops	1.869s