首次提交：初始化项目代码

escape/slice_map_escape.go

@@ -0,0 +1,45 @@
+package main
+
+import "fmt"
+
+type Person3 struct {
+	Name string
+	Age  int
+}
+
+// sliceEscape 切片元素为指针，且切片被返回，元素逃逸
+func sliceEscape() []*Person3 {
+	var people []*Person3
+	for i := 0; i < 3; i++ {
+		person := &Person3{Name: fmt.Sprintf("Person3%d", i), Age: 20 + i}
+		people = append(people, person) // person 逃逸
+	}
+	return people
+}
+
+// dynamicSlice 切片动态扩容，底层数组逃逸
+func dynamicSlice() []int {
+	s := make([]int, 0) // 编译期无法确定最终容量
+	for i := 0; i < 100; i++ {
+		s = append(s, i) // 扩容时底层数组逃逸
+	}
+	return s
+}
+
+// mapEscape 映射值为指针，值逃逸
+func mapEscape() map[string]*Person3 {
+	m := make(map[string]*Person3)
+	m["alice"] = &Person3{Name: "Alice", Age: 25} // 指针值逃逸
+	return m
+}
+
+func main() {
+	people := sliceEscape()
+	fmt.Printf("切片元素逃逸：%d个Person\n", len(people))
+
+	s := dynamicSlice()
+	fmt.Printf("切片扩容逃逸：len=%d, cap=%d\n", len(s), cap(s))
+
+	m := mapEscape()
+	fmt.Printf("映射值逃逸：%+v\n", *m["alice"])
+}