Исходники и презентации

lessons/maps/reservation/comparison_test.go

@@ -0,0 +1,25 @@
+package main
+
+import "testing"
+
+// go test -bench=. comparison_test.go
+
+func BenchmarkWithoutReservation(b *testing.B) {
+	sourseData := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17}
+	for i := 0; i < b.N; i++ {
+		lookup := make(map[int]struct{})
+		for j := 0; j < len(sourseData); j++ {
+			lookup[j] = struct{}{}
+		}
+	}
+}
+
+func BenchmarkWithReservation(b *testing.B) {
+	sourseData := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17}
+	for i := 0; i < b.N; i++ {
+		lookup := make(map[int]struct{}, len(sourseData))
+		for j := 0; j < len(sourseData); j++ {
+			lookup[j] = struct{}{}
+		}
+	}
+}