Benchmark two ways of getting pointer to int.

Both ways end up generating same code using gc.

	BenchmarkOldInt-8	100000000	        22.7 ns/op	       8 B/op	       1 allocs/op
	BenchmarkNewInt-8	100000000	        22.9 ns/op	       8 B/op	       1 allocs/op

190/main.go

@@ -0,0 +1,4 @@
+// Benchmark two ways of getting pointer to int.
+package main
+
+func main() {}

190/main_test.go

@@ -0,0 +1,31 @@
+package main
+
+import "testing"
+
+var result *int
+
+func OldInt(v int) *int {
+	p := new(int)
+	*p = v
+	return p
+}
+
+func NewInt(v int) *int {
+	return &v
+}
+
+func BenchmarkOldInt(b *testing.B) {
+	var r *int
+	for i := 0; i < b.N; i++ {
+		r = OldInt(i)
+	}
+	result = r
+}
+
+func BenchmarkNewInt(b *testing.B) {
+	var r *int
+	for i := 0; i < b.N; i++ {
+		r = NewInt(i)
+	}
+	result = r
+}