Go map发生内存泄漏解决方法

packagemain

import(

    "fmt"

    "runtime"

)

constN = 128

funcrandBytes() [N]byte{

    return[N]byte{}

}

funcprintAlloc() {

    varm runtime.MemStats

    runtime.ReadMemStats(&m)

    fmt.Printf("%d MB\n", m.Alloc/1024/1024)

}

funcmain() {

    n := 1_000_000

    m := make(map[int][N]byte, 0)

    printAlloc()

    fori := 0; i < n; i++ {

        m[i] = randBytes()

    }

    printAlloc()

    fori := 0; i < n; i++ {

        delete(m, i)

    }

    runtime.GC()

    printAlloc()

    runtime.KeepAlive(m)

}