Исходники и презентации

lessons/strings/allocations/main.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"fmt"
+	"testing"
+)
+
+var result string
+
+func Concat(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		result = "Hello" + " world"
+	}
+}
+
+func Conversion(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		result = string([]byte("Hello world"))
+	}
+}
+
+func main() {
+	b1 := testing.Benchmark(Concat)
+	fmt.Println("b1:", b1.AllocsPerOp())       // 0
+	fmt.Println("b1:", b1.AllocedBytesPerOp()) // 0
+
+	b2 := testing.Benchmark(Conversion)
+	fmt.Println("b2:", b2.AllocsPerOp())       // 1
+	fmt.Println("b2:", b2.AllocedBytesPerOp()) // 16
+}