Исходники и презентации

lessons/slices_and_arrays/range_by_array_comparison/comparison_test.go

@@ -0,0 +1,39 @@
+package main
+
+import "testing"
+
+// go test -bench=. comparison_test.go
+
+type account struct {
+	balance int
+}
+
+func BenchmarkWithPointers(b *testing.B) {
+	accounts := [...]*account{
+		{balance: 100},
+		{balance: 200},
+		{balance: 300},
+	}
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		for _, a := range accounts {
+			a.balance += 1
+		}
+	}
+}
+
+func BenchmarkWithIndices(b *testing.B) {
+	accounts := [...]account{
+		{balance: 100},
+		{balance: 200},
+		{balance: 300},
+	}
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		for i := range accounts {
+			accounts[i].balance += 1
+		}
+	}
+}