Исходники и презентации

lessons/slices_and_arrays/slices_comparison_effective/comparison_test.go

@@ -0,0 +1,50 @@
+package main
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+)
+
+// go test -bench=. -benchmem comparison_test.go
+
+func equal(lhs, rhs []int) bool {
+	if len(lhs) != len(rhs) {
+		return false
+	}
+
+	for i := 0; i < len(lhs); i++ {
+		if lhs[i] != rhs[i] {
+			return false
+		}
+	}
+
+	return true
+}
+
+func BenchmarkWithEqualFunction(b *testing.B) {
+	lhs := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
+	rhs := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
+
+	for i := 0; i < b.N; i++ {
+		_ = equal(lhs, rhs) // slices.Equal(...)
+	}
+}
+
+func BenchmarkWithReflect(b *testing.B) {
+	lhs := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
+	rhs := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
+
+	for i := 0; i < b.N; i++ {
+		_ = reflect.DeepEqual(lhs, rhs)
+	}
+}
+
+func BenchmarkWithSprint(b *testing.B) {
+	lhs := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
+	rhs := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
+
+	for i := 0; i < b.N; i++ {
+		_ = fmt.Sprint(lhs) == fmt.Sprint(rhs)
+	}
+}