Исходники и презентации

lessons/functions/defer_performance/comparison_test.go

@@ -0,0 +1,31 @@
+package main
+
+import "testing"
+
+// go test -bench=. comparison_test.go
+
+//go:noinline
+func withDefer(a, b int) {
+	defer func() {
+		Result = a + b
+	}()
+}
+
+//go:noinline
+func withoutDefer(a, b int) {
+	Result = a + b
+}
+
+var Result int
+
+func BenchmarkWithDefer(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		withDefer(-1, i)
+	}
+}
+
+func BenchmarkWithoutDefer(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		withoutDefer(-1, i)
+	}
+}