Исходники и презентации

lessons/functions/recursion/recursion_test.go

@@ -0,0 +1,35 @@
+package main
+
+import "testing"
+
+func SlowFactorial(number int) int {
+	if number == 0 {
+		return 1
+	}
+
+	return number * SlowFactorial(number-1)
+}
+
+func FastFactorial(number int) int {
+	return factorial(number, 1)
+}
+
+func factorial(number, accumulator int) int {
+	if number == 1 {
+		return accumulator
+	}
+
+	return factorial(number-1, number*accumulator)
+}
+
+func BenchmarkSlowRecursion(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		_ = SlowFactorial(10)
+	}
+}
+
+func BenchmarkFastRecursion(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		_ = FastFactorial(10)
+	}
+}