Go’s Memory Leak Caused by Slice

Unlike C/C++, Go has GC, so we don’t need to handle memory allocation/release. However, we also should be cautious about memory leak.

Today, let’s see a memory leak case caused by slice .

package main
import (
 "fmt"
)
type Object struct {}
func main() {
    var a []*Object
    for i := 0; i < 8; i++ {
        a = append(a, new(Object))
    }
    fmt.Println(cap(a), len(a)) // Output: 8, 8
    a = remove(a, 5)