Исходники и презентации

lessons/maps/comparison/comparison_test.go

@@ -0,0 +1,74 @@
+package main
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+)
+
+// go test -bench=. comparison_test.go
+
+type client struct {
+	operations map[int]int
+}
+
+func (c *client) equal(other *client) bool {
+	if c == other {
+		return true
+	}
+
+	if len(c.operations) != len(other.operations) {
+		return false
+	}
+
+	for key, value := range c.operations {
+		otherValue, found := other.operations[key]
+		if !found || value != otherValue {
+			return false
+		}
+	}
+
+	return true
+}
+
+func BenchmarkWithEqualFunction(b *testing.B) {
+	lhs := client{
+		operations: map[int]int{1: 2, 2: 5, 3: 7, 4: 9, 5: 10, 6: 3, 7: 4},
+	}
+
+	rhs := client{
+		operations: map[int]int{1: 2, 2: 5, 3: 7, 4: 9, 5: 10, 6: 3, 7: 4},
+	}
+
+	for i := 0; i < b.N; i++ {
+		_ = lhs.equal(&rhs) // maps.Equal()
+	}
+}
+
+func BenchmarkWithReflect(b *testing.B) {
+	lhs := client{
+		operations: map[int]int{1: 2, 2: 5, 3: 7, 4: 9, 5: 10, 6: 3, 7: 4},
+	}
+
+	rhs := client{
+		operations: map[int]int{1: 2, 2: 5, 3: 7, 4: 9, 5: 10, 6: 3, 7: 4},
+	}
+
+	for i := 0; i < b.N; i++ {
+		_ = reflect.DeepEqual(lhs, rhs)
+	}
+}
+
+func BenchmarkWithStringFunction(b *testing.B) {
+	lhs := client{
+		operations: map[int]int{1: 2, 2: 5, 3: 7, 4: 9, 5: 10, 6: 3, 7: 4},
+	}
+
+	rhs := client{
+		operations: map[int]int{1: 2, 2: 5, 3: 7, 4: 9, 5: 10, 6: 3, 7: 4},
+	}
+
+	for i := 0; i < b.N; i++ {
+		_ = fmt.Sprint(lhs) == fmt.Sprint(rhs)
+	}
+}