30 lines
641 B
Go
30 lines
641 B
Go
package main
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import "fmt"
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// largeArrayEscape 大数组指针返回，触发逃逸
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func largeArrayEscape() *[10000]int {
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arr := new([10000]int) // 8MB（int占8字节），超过栈阈值，逃逸至堆
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for i := 0; i < 10000; i++ {
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arr[i] = i
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}
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return arr
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}
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// smallArrayNoEscape 小数组，不逃逸
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func smallArrayNoEscape() [10]int {
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var arr [10]int
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for i := 0; i < 10; i++ {
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arr[i] = i
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}
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return arr // 值拷贝，不逃逸
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}
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func main() {
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largeArr := largeArrayEscape()
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fmt.Printf("大数组逃逸：长度=%d\n", len(largeArr))
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smallArr := smallArrayNoEscape()
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fmt.Printf("小数组不逃逸：%v\n", smallArr)
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}
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