benchmark: empty map traverse

utils_test.go

@@ -0,0 +1,41 @@
+package nano
+
+import "testing"
+
+func null(key, value int) int {
+	key += value
+	return key
+}
+
+func test1(m map[int]int) {
+	if len(m) < 1 {
+		return
+	}
+	for k, v := range m {
+		null(k, v)
+	}
+}
+
+func BenchmarkEmptyMap1(b *testing.B) {
+	b.ReportAllocs()
+
+	m := map[int]int{}
+	for i := 0; i < b.N; i++ {
+		test1(m)
+	}
+}
+
+func test2(m map[int]int) {
+	for k, v := range m {
+		null(k, v)
+	}
+}
+
+func BenchmarkEmptyMap2(b *testing.B) {
+	b.ReportAllocs()
+
+	m := map[int]int{}
+	for i := 0; i < b.N; i++ {
+		test2(m)
+	}
+}