main.go

package main

func main() {
  ch := make(chan int)
  x := make([]int, 10)
  go (func() {
    y := make([]int, 10)
    for i := 0; i < 1000000; i++ {
      z := x
      z[len(z)-1] = -1
      x = y
    }
    ch <- 0
  })();
  go (func() {
    y := make([]int, 1000000)
    for i := 0; i < 1000000; i++ {
      z := x
      z[len(z)-1] = -1
      x = y
    }
    ch <- 0
  })();
  <- ch
  <- ch
}